Texas sales tax audits are handled by the Texas Comptroller of Public Accounts, and they can move quickly if you are not prepared. For ecommerce and cross‑border sellers, the combination of marketplace rules, remote seller nexus and the Texas single local use tax rate creates both opportunities and risk. If you receive an audit notice, your first priorities are to control deadlines, understand exactly what the Comptroller is asking for, and protect yourself before you turn over data.
Sales Tax Compliance USA is a done‑for‑you sales and use tax service staffed by specialists who work directly with Texas audits every day. We help remote sellers, marketplace merchants and multistate businesses respond to audit notices, manage information requests, challenge proposed assessments, and use Texas procedures such as voluntary disclosure and audit review to limit tax, penalties and interest where the rules allow. This page explains how Texas sales tax audits work, what to expect, where businesses commonly get into trouble, and when it is smart to involve a professional Texas audit defense team.
What a Texas Sales Tax Audit Is and How It Works
A Texas sales tax audit is an examination by the Texas Comptroller of Public Accounts of your records to verify that you have correctly collected, reported and paid Texas sales and use tax. The Comptroller administers both the 6.25% state sales and use tax and the related local sales and use taxes, including the optional single local use tax rate available to qualifying remote sellers. The audit is designed to compare what you reported on your Texas sales and use tax returns, typically filed through the Texas Webfile system, against your underlying books, bank deposits, ecommerce platform reports and exemption documentation.
During a typical audit, a Comptroller auditor will ask for access to your sales records, purchase invoices, resale and exemption certificates, marketplace statements, shipping records, and any internal tax matrices you use to decide what is taxable. For remote sellers and ecommerce businesses, this often includes detailed transaction exports from shopping carts, marketplaces and payment processors. The auditor may test whether you properly applied the single local use tax rate if you elected it as a remote seller, and whether you correctly treated taxable versus exempt items for Texas purposes.
Texas is not a home‑rule state for sales and use tax, which means local jurisdictions do not administer their own separate sales tax systems. Texas local sales and use tax is centrally administered by the Comptroller, even though local cities, counties, special purpose districts and transit authorities may impose their own rates. This makes the Comptroller audit particularly important: a single review can impact your state and local obligations at the same time. For remote sellers who use the single local use tax rate, the audit may focus on whether you were eligible for that option and whether you calculated it correctly over the audit period.
At the end of the audit, the Comptroller will issue findings that may include underpayments of tax, overpayments, or sometimes both. If the auditor believes you under‑collected or under‑paid tax, they will propose an assessment that can include tax, penalties and interest. You have specific rights and procedures to challenge those results, request review by the Comptroller, and in some cases pursue further administrative or judicial remedies. The exact procedures and deadlines depend on your situation and should be confirmed directly with the Texas Comptroller of Public Accounts or reviewed with a professional.
Common Triggers for Texas Sales Tax Audits
The Texas Comptroller selects businesses for sales tax audits based on a mix of data analysis, compliance history and targeted enforcement priorities. While the Comptroller does not publish a complete list of audit triggers, common patterns can be inferred from how audits are conducted. Large swings in reported taxable sales, frequent filing errors, or periods with missing returns can all draw attention. If your Texas Webfile account shows repeated late filings, amended returns or unexplained gaps in reporting, that can increase the likelihood of review.
For ecommerce and remote sellers, a major trigger is nexus and registration. Texas requires remote sellers that exceed a revenue threshold in the state to register and collect tax. If the Comptroller identifies significant untaxed Texas‑destination sales from a remote seller that is not registered, this can lead either to outreach from the Business Activity Research Team or a full audit when a permit is obtained. Similarly, marketplace facilitator data and third‑party information can reveal inconsistencies between what platforms report and what you report directly.
Other practical triggers include operating in high‑risk industries, having prior audit assessments, and claiming substantial exemptions or resale. If your Texas returns show large amounts of tax‑exempt sales without corresponding exemption certificates, the Comptroller may want to verify that those exemptions are legitimate. Sudden changes in whether you use the single local use tax rate, or shifts between reporting as a remote seller and as an in‑state seller, can also prompt questions.
Because the Comptroller can use both internal data and public information to identify potential noncompliance, you should assume that unexplained discrepancies and missing documentation increase your audit risk. If you know that your Texas filings are incomplete or that you have unregistered activity, voluntary disclosure and proactive cleanup can often reduce your exposure compared with waiting for an audit notice.
Step‑by‑Step Texas Sales Tax Audit Timeline
While each Texas sales tax audit is unique, most follow a familiar timeline. First, the Texas Comptroller of Public Accounts sends a written notice informing you that your business has been selected for a sales and use tax audit. This notice identifies the tax type, general periods to be examined, and the auditor assigned to your case. It may arrive by mail or electronically if you have authorized such communication. The notice usually includes an initial information request and a deadline to respond or schedule an opening conference.
The next step is the opening conference, which can be held by phone, video or in person. During this discussion, the auditor explains the scope of the audit, asks questions about your business model, and clarifies what records will be needed. For ecommerce and cross‑border sellers, this is where you should explain your use of marketplaces, remote seller status, and whether you elected the single local use tax rate. You can also request reasonable time to gather records and negotiate the format of the data you will provide, such as spreadsheets or exports from your systems.
After the opening conference, the fieldwork stage begins. The auditor reviews your records, often using sampling techniques if you have a large volume of transactions. They may test a subset of periods or customers and then project the results to the full audit period. They will examine your exemption certificates, purchase records for use tax, and how you calculated state and local tax, including application of the single local use tax rate if you used that option. During this phase, you may receive follow‑up questions or requests for additional documentation.
Once fieldwork is complete, the auditor prepares preliminary findings and provides them to you, often as a proposed assessment schedule. You have an opportunity to respond, provide additional documentation, and challenge assumptions such as sampling methods or treatment of specific transactions. If issues remain, the Comptroller can issue a formal assessment. You then enter the review and appeal phase, which includes rights to request an internal review or hearing and, in some cases, further appeals. The timing of each stage depends on the complexity of the audit and both parties’ responsiveness, so you should verify current deadlines and procedures with the Texas Comptroller or consult with a professional Texas audit defense team.
Proven Texas Sales Tax Audit Defense Strategies
Effective Texas sales tax audit defense starts before you deliver a single record to the Comptroller. The most important strategy is to control the flow of information: respond to the audit notice promptly, but do not automatically give auditors unrestricted access to all systems. Instead, assemble organized, relevant records that directly answer their requests. This keeps the audit focused and reduces the chance that unrelated issues will expand the scope of the examination.
Another key strategy is to review sampling and projections critically. If the auditor proposes to sample certain months or accounts and extrapolate to the full audit period, you should evaluate whether those samples are representative. Unusual periods with promotions, one‑time transactions or data errors can distort the sample and inflate projected liability. Where permitted by Comptroller procedures, you can request alternative sampling, provide corrected data, or document why certain sampled items are not typical of your normal operations.
Documentation is central to Texas audit defense. For every exempt sale you claimed, you should gather valid Texas exemption or resale certificates and ensure they are complete and legible. For remote sellers using the single local use tax rate, you should confirm that you met eligibility criteria during the audit period and that your elections and returns properly reflect that rate. Where your treatment of certain products or services depends on specific Texas rules, keep written support such as Comptroller publications or private letter rulings if applicable. If the exact rule is unclear, the safest course is to acknowledge that the position depends on your circumstances and either seek clarification from the Texas Comptroller or work with a professional to do so.
Finally, you should actively pursue reductions in proposed assessments where the evidence supports it. This can include identifying overpayments that offset underpayments, correcting misclassified items, and negotiating penalty relief when you can show good‑faith efforts at compliance. For many ecommerce and cross‑border sellers, involving a dedicated Texas audit defense service early in the process improves outcomes by ensuring that all available procedural and substantive defenses are identified and presented clearly to the Comptroller.
How Sampling and Projections Can Inflate Your Texas Tax Bill
Texas sales tax auditors often use sampling to avoid reviewing every transaction in a high‑volume business. In practice, they select a subset of periods, invoices or customers, measure errors such as under‑collected tax or missing exemptions, and then project those error rates across the entire audit period. This method can significantly increase your proposed liability if the chosen sample periods contain atypical activity or data problems.
For ecommerce and remote sellers, sampling can be especially sensitive because transaction counts are high and systems may have changed over time. A sample taken from months when you were switching shopping carts, updating tax settings or onboarding new channels may show higher error rates than your normal operations. If those months are used to project liability over several years, the resulting assessment can be much larger than the actual issue. Similarly, if the sample includes transactions before you elected the single local use tax rate but the projection is applied to later periods where you used that simplified rate, the math may not reflect your true obligations.
Auditors may also use projections for use tax on purchases. They can review a selection of expense invoices, identify items where Texas use tax should have been accrued but was not, and then estimate a percentage of noncompliant purchases to apply to total expenses. If your accounting system changed, or if certain departments had unusual spending patterns in the sample period, this projection can overstate use tax exposure. The impact can be particularly large for cross‑border businesses that import inventory or equipment into Texas.
Because sampling and projection methods can materially inflate your tax bill, you should carefully review any proposed sample, ask how the Comptroller selected it, and test whether it is statistically and operationally representative of your business. Where you identify anomalies, you can propose alternative sampling, provide corrected data, or demonstrate why certain sample items should be excluded. The exact options and standards depend on current Comptroller audit policies, which should be confirmed directly with the Texas Comptroller of Public Accounts or evaluated with a professional who regularly handles Texas sales tax audits.
Reducing Assessments, Penalties, and Interest in Texas
When a Texas sales tax audit results in a proposed assessment, you are not required to accept it as‑is. You can work with the auditor to correct factual errors, present additional documentation, and identify overpayments that offset underpayments. In many cases, careful review of exemption documentation, product taxability and remote seller treatment significantly reduces the tax portion of an assessment. For example, properly documented exempt sales to Texas resellers or customers with valid exemption certificates may be removed from the taxable base.
Penalties and interest are separate components. Texas law allows the Comptroller to impose civil penalties for late filing, late payment, or failure to remit tax, along with interest on underpaid amounts. In certain circumstances, penalty relief may be available if you can show reasonable cause, good‑faith reliance on published guidance, or that you promptly corrected issues once discovered. Some forms of voluntary disclosure, discussed below, can also limit penalties for past periods when you come forward before the Comptroller contacts you. Whether interest can be reduced or waived depends on specific statutory rules and Comptroller policy; this should be confirmed directly with the Texas Comptroller for your situation.
To pursue reductions, you must act within the Comptroller’s timelines. After receiving a proposed assessment, you typically have a limited period to respond, provide support, and request reconsideration. Missing these deadlines can make it more difficult to adjust the assessment or seek penalty relief. Prompt communication, organized records, and a clear explanation of your compliance efforts all improve your chances of a favorable adjustment.
For ecommerce and cross‑border sellers, managing assessments, penalties and interest is best done with a structured plan. This includes reconciling your Texas Webfile returns to your internal data, double‑checking application of the single local use tax rate if you used it as a remote seller, and segmenting transactions by taxability and exemption status. A professional Texas audit defense team can help you identify where the Comptroller’s calculations can be challenged, what relief may be available, and how to communicate effectively with the auditor and their supervisors.
How to Appeal or Challenge Texas Sales Tax Audit Results
If you disagree with the results of a Texas sales tax audit, you have specific rights to challenge them. After the Comptroller issues a formal assessment, you can generally request an internal review or follow the Comptroller’s administrative protest procedures. This usually requires filing a written protest or request that explains the issues you dispute, the legal or factual basis for your position, and the relief you seek. The protest must be filed within the time limit set by Texas law and Comptroller rules, which can vary by case and should be verified directly with the Texas Comptroller of Public Accounts.
During the appeal process, you may have opportunities for further discussion with audit review personnel or other Comptroller staff who were not involved in the original fieldwork. You can present additional documentation, legal arguments and alternative calculations, including challenges to sampling, projections and product taxability determinations. For remote sellers and marketplace businesses, this is also the time to clarify how your operations fit within Texas guidance on remote seller nexus, marketplace facilitator rules and the single local use tax rate option.
In some cases, Texas procedures allow for more formal administrative hearings or subsequent judicial review if disputes are not resolved at the protest stage. These options involve additional steps, such as filing with relevant state bodies, meeting briefing schedules and potentially participating in hearings. Because these more advanced appeals can be complex and time‑sensitive, most businesses benefit from involving professionals who understand Texas sales tax procedures and can coordinate legal and accounting input.
The most important point is that you do not have to accept the first assessment as final. If you believe the Comptroller misapplied Texas rules, misunderstood your data, or overstated liability through sampling, you can challenge those results using the procedures that apply to your situation. The precise steps, forms and deadlines should always be confirmed against current information on the Texas Comptroller’s site or with a qualified advisor before you act.
Voluntary Disclosure and Cleanup Before an Audit
Texas offers a voluntary disclosure program administered by the Texas Comptroller of Public Accounts that allows eligible businesses to report and pay previously unpaid or underpaid taxes before the Comptroller contacts them about those liabilities. Under this program, a taxpayer that has not been previously contacted by the Comptroller about the tax type and periods in question may approach the Comptroller, often anonymously at first through a representative, to negotiate terms for resolving past exposure. This can apply to sales and use tax and is particularly relevant for remote sellers and multistate businesses that discover they had Texas nexus in prior years.
A typical voluntary disclosure process involves identifying when your Texas nexus began, estimating your back tax liability, and submitting an application to the Comptroller’s team that handles voluntary disclosures. If the Comptroller agrees that you qualify, they prepare a voluntary disclosure agreement that outlines the look‑back period, the taxes to be reported, and how penalties will be handled. Many published descriptions of the Texas program indicate that voluntary disclosure can limit the number of years reviewed and provide relief from certain civil penalties, provided you register, file and pay the agreed tax and interest within specified timeframes. The exact terms, including the number of years and treatment of penalties and interest, depend on current Comptroller policy and the specifics of your case, so they must be confirmed directly with the Texas Comptroller.
Once the agreement is executed, you are typically required to register for a sales tax permit if you do not already have one, file the required returns for the agreed periods, and remit the tax and interest. After the Comptroller processes the filings and payment, they finalize the agreement and close out the disclosed periods, generally protecting you from further assessment for those periods so long as you have complied with the agreement. This provides a controlled way to clean up outstanding liabilities before a future audit and can substantially reduce overall cost compared with being audited for all open years without voluntary disclosure protections.
Voluntary disclosure is most useful when you recognize Texas exposure before the Comptroller has made contact or initiated an audit. For ecommerce and cross‑border sellers, this might occur after a nexus review or when you realize that you exceeded Texas thresholds and did not register. In those situations, it is often wise to speak with a professional Texas sales tax service to determine whether you qualify and to structure an anonymous approach to the Comptroller, so you can negotiate favorable terms before revealing your identity.
High‑Risk Industries and Sector‑Specific Texas Audit Issues
The Texas Comptroller focuses enforcement attention on industries where sales and use tax rules are complex and error rates are historically high. For ecommerce and cross‑border sellers, this often includes businesses dealing in digital goods and services, mixed tangible and digital products, subscription models, and fulfillment‑center or drop‑shipment arrangements. Texas rules on what is taxable versus exempt can vary by product category, and misclassifications can lead to significant assessments during audits.
Retail and wholesale businesses that sell to other businesses are also high‑risk if they rely heavily on resale and exemption certificates. In Texas, exempt sales must generally be supported by valid exemption documentation; if certificates are missing, incomplete or not specific to Texas, auditors can reclassify those sales as taxable. This risk is magnified for remote sellers shipping into Texas who may have customers across many industries and states, each with different exemption practices.
Cross‑border businesses that move inventory into Texas or own equipment in the state can face sector‑specific issues related to use tax. If you purchase items outside Texas and then use, store or consume them in the state without paying Texas tax at the time of purchase, the Comptroller may assess use tax in an audit. For sellers using third‑party logistics providers or fulfillment centers in Texas, ownership and use of inventory can raise both nexus and use tax questions.
Finally, marketplace sellers and remote sellers using the single local use tax rate face unique audit considerations. The Comptroller may test whether marketplaces correctly collected and remitted tax on your behalf, whether you properly reported direct sales versus marketplace sales, and whether you were eligible to elect and continue using the single local use tax rate throughout the audit period. Given these sector‑specific challenges, high‑risk industries benefit from tailored Texas audit defense strategies that account for their product mix, sales channels and cross‑border operations.
Texas Remote Sellers, the Single Local Use Tax Rate, and Audit Risk
Texas offers qualifying remote sellers an optional single local use tax rate as a simplified alternative to tracking every individual local jurisdiction rate. Instead of calculating local tax based on the destination city, county, transit authority and special purpose district for each sale, a remote seller that meets Texas criteria may elect to collect a uniform local rate on all Texas sales. The Comptroller determines and publishes this single local use tax rate annually based on the estimated average rate of local sales and use taxes imposed statewide.
Not sure how this applies to your business? We handle US sales tax registration, filing and remittance for ecommerce sellers as a fully managed service, for one fee. Book a free consultation and we will review your own position with you.
For remote sellers, this option can significantly reduce compliance burden because you do not need to maintain and update detailed Texas local rate tables. However, it also creates audit exposure if you misunderstand the eligibility rules or apply the rate incorrectly. The single local use tax rate is available only to certain remote sellers, and in‑state businesses generally cannot use this option. If you elected the single local use tax rate but had operations in Texas that disqualify you, or if you used the rate for periods before you notified the Comptroller and properly updated your account, an audit may result in recomputation of local tax using destination‑based rates.
During an audit, the Comptroller may review your election documentation, such as the application or forms used to choose the single local use tax rate, and reconcile your returns to the published rate for the relevant years. They may also verify that you consistently applied the single rate to all taxable sales, and did not mix it with destination‑based rates in a way that under‑remitted local tax. If your business changed during the audit period—for example, you opened a location in Texas or began storing inventory in the state—the auditor can question whether you remained eligible for the remote seller single‑rate option.
To manage this risk, remote sellers should correctly register with the Texas Comptroller, confirm the current single local use tax rate on the Comptroller’s site, and maintain records showing when they elected the option and how they applied it in their systems. If you are unsure whether you qualify or how to make or revoke the election, the safest approach is to acknowledge that eligibility depends on your specific circumstances and then confirm the position with the Texas Comptroller of Public Accounts or work with a professional Texas sales tax service to do so.
When to Involve a Professional Texas Audit Defense Team
Many businesses wait until late in a Texas sales tax audit to involve professional help, but the most effective time to bring in a Texas audit defense team is as soon as you receive an audit notice. Early involvement allows professionals to manage the opening conference, scope requests, and help you gather records in a way that minimizes risk. For ecommerce and cross‑border sellers with complex data from multiple platforms, professionals can also translate your transaction reports into formats that auditors can understand without misinterpreting key details.
You should seriously consider engaging a professional team if the Comptroller proposes substantial assessments, if sampling and projections are central to the audit, or if you operate in high‑risk industries such as digital products, subscription services or marketplace‑heavy retail. Professional audit defenders can identify where sampling is flawed, where product taxability determinations are inconsistent with Texas guidance, and how remote seller rules and the single local use tax rate should be applied. They can also handle communications with the Comptroller, reducing the chance that off‑hand comments or incomplete explanations damage your position.
Engaging a professional is also wise when you suspect significant past exposure but have not yet been contacted by the Comptroller. In that case, a team experienced with Texas voluntary disclosure can help you evaluate nexus, quantify liabilities, and approach the Comptroller anonymously to negotiate a manageable resolution. This is often more cost‑effective than waiting for an audit, especially when you have long‑running unregistered activity.
Sales Tax Compliance USA is built for exactly these situations. As a done‑for‑you US sales and use tax service, we take ownership of the Texas audit defense process—from interpreting the notice and organizing your data, to challenging proposed assessments and guiding voluntary disclosure where appropriate. If you are facing a Texas sales tax audit or know you have exposure, involving a professional team early is one of the most important steps you can take to protect your business.
Key differences between Texas remote sellers using the single local use tax rate and other Texas sellers, and how those differences affect audit risk and compliance tasks.
| Seller type / situation | Texas sales and use tax implications |
|---|---|
| Remote seller eligible for the single local use tax rate and has properly elected it | May collect a uniform local use tax rate on all Texas sales instead of destination‑based local rates; simplifies compliance and audit reconciliation but requires consistent application and proof of eligibility. Audits will focus on whether the single rate matches the Comptroller’s published rate for the period and whether all taxable sales are correctly reported. |
| Remote seller with Texas nexus that has not elected the single local use tax rate | Must track and apply destination‑based local sales and use tax rates for each Texas sale. Compliance involves maintaining detailed local rate data and updating systems as local rates change. Audits will examine whether correct local rates were used and whether all taxable Texas‑destination sales were reported. |
| Texas‑based seller with physical presence in the state | Cannot generally use the remote‑seller single local use tax rate option and must apply state and local rates based on where sales are sourced under Texas rules. Audits may review in‑state operations, local sourcing, and use tax on in‑state purchases, and can easily cover both state and local obligations because Texas is not a home‑rule state. |
| Marketplace seller relying on marketplace facilitator to collect Texas tax | Must understand which sales the marketplace collects and remits tax for and which direct sales they are responsible for. Audit risk includes mismatches between marketplace reports and the seller’s Texas returns, missing documentation of marketplace‑collected tax, and uncertainty over who is responsible for local tax on certain transactions. |
| Cross‑border business importing inventory or equipment into Texas | Faces additional Texas use tax exposure on items purchased outside Texas and then used, stored or consumed in the state. Audits will test whether use tax has been correctly accrued on such purchases and may apply sampling and projections to expense accounts. Managing documentation of where property is used and stored is critical. |
| Business with significant exempt or resale sales to Texas customers | Must maintain valid Texas exemption or resale certificates for exempt sales. During audits, missing or defective certificates can cause those sales to be reclassified as taxable. Proper certificate management can materially reduce assessments, while poor documentation increases audit risk and potential tax, penalties and interest. |
Frequently asked questions
What should I do first if I receive a Texas sales tax audit notice?
When you receive a Texas sales tax audit notice from the Texas Comptroller of Public Accounts, the first step is to read it carefully and note the tax types, periods and deadlines involved. Do not ignore the notice or delay responding, as missed deadlines can limit your options. Next, schedule an opening conference and begin gathering organized records that relate directly to the Comptroller’s requests, including Texas Webfile returns, sales data, exemption certificates and purchase records. Before you provide any information, consider involving a professional Texas audit defense team to help manage communications, narrow the scope where appropriate and ensure that what you submit supports, rather than harms, your position.
How long does a Texas sales tax audit usually take?
The length of a Texas sales tax audit varies widely based on the complexity of your business, the volume of transactions, and how quickly both you and the auditor can exchange information. Some smaller audits may be completed in a few months, while complex ecommerce or multistate audits can extend over a year or more. The audit timeline includes the initial notice, opening conference, fieldwork, preliminary findings, and any review or appeal. Because there is no single fixed duration that applies to every case, you should confirm your specific deadlines and expectations with the Texas Comptroller of Public Accounts, and plan for the audit to require sustained attention over the entire period.
Can I reduce or remove penalties and interest from a Texas sales tax audit?
Texas law allows the Comptroller to assess penalties and interest on underpaid or late‑paid sales and use tax, but there are circumstances where penalties can be reduced or waived. For example, showing reasonable cause, good‑faith efforts at compliance, or correcting issues promptly can support penalty relief, and voluntary disclosure before audit contact can also limit penalties for past periods. Interest is generally more difficult to reduce and is governed by specific statutory rules. Any request to reduce penalties or interest must follow Texas procedures and will depend on your facts, so the exact position should be confirmed with the Texas Comptroller or evaluated with a professional familiar with current Texas policy.
When should I hire a professional for Texas sales tax audit defense?
Hiring a professional Texas sales tax audit defense team is advisable as soon as you receive an audit notice, before you respond substantively to the Comptroller. Early involvement allows professionals to manage the opening conference, shape information requests, and help organize your data to minimize risk. You should also seek professional help if the audit involves complex sampling and projections, if the Comptroller proposes a substantial assessment, or if you operate in high‑risk sectors such as ecommerce, digital products or marketplace‑heavy retail. Professionals can identify defenses you may miss and guide you through protest or voluntary disclosure options as needed.
How do auditors use sampling and projections in Texas sales tax audits?
In Texas sales tax audits, auditors frequently use sampling when reviewing businesses with large transaction volumes. They select a subset of periods, invoices or accounts, measure errors such as under‑collected tax or missing exemptions, and then project those error rates across the full audit period. Similar sampling can be applied to purchase records to estimate unpaid use tax. These projections can significantly affect your proposed liability, especially if sample periods are not representative of your normal operations. Because methods and standards can change over time, you should review any sampling plan carefully and, if needed, confirm current Comptroller practices or work with a professional to challenge flawed projections.
What are the most common reasons businesses get audited for Texas sales tax?
Common reasons for Texas sales tax audits include filing patterns that suggest errors, such as inconsistent or missing returns; large changes in reported taxable sales; and frequent late filings or amendments in the Texas Webfile system. Remote sellers and multistate businesses may be audited when the Comptroller identifies unregistered Texas‑destination sales that appear to exceed nexus thresholds. High‑risk industries with complex taxability rules or heavy use of exemptions—such as ecommerce, wholesale and digital products—also attract attention. While the Comptroller does not publish every trigger, it is clear that inconsistent reporting, poor documentation and unregistered taxable activity increase audit risk.
How do I appeal the results of a Texas sales tax audit?
To appeal the results of a Texas sales tax audit, you typically must file a written protest or request for review with the Texas Comptroller of Public Accounts within the time limit specified in your assessment notice and applicable Texas law. Your protest should identify the issues you dispute, explain your factual and legal position, and include supporting documentation. The Comptroller may then assign personnel to review your case, and in some situations you can pursue more formal administrative hearings or further appeals if disputes remain. Because procedures and deadlines can change and vary by case, it is essential to confirm current appeal rules with the Comptroller or work with a professional who regularly handles Texas tax protests.
What is a Texas voluntary disclosure agreement and when is it useful?
A Texas voluntary disclosure agreement is an arrangement with the Texas Comptroller of Public Accounts that allows eligible businesses to come forward and report previously unpaid or underpaid taxes before the Comptroller contacts them about those liabilities. Under the voluntary disclosure program, qualifying taxpayers can typically limit the number of years reviewed and obtain relief from certain civil penalties, provided they register, file and pay the agreed tax and interest within specified timeframes. It is particularly useful for remote sellers and multistate businesses that discover past Texas nexus or unreported sales and want to resolve exposure on controlled terms rather than risk a full audit. The precise benefits and eligibility requirements depend on current Comptroller policy and must be confirmed for your situation.
How we handle this for you
The mechanics in Texas are manageable on their own; the cost is the time it takes every single filing period, in every state you are registered in. We are a managed service: our team registers you with the Texas Comptroller of Public Accounts, prepares and files your returns, and keeps you compliant period after period. You get one point of contact and one invoice — you do not get another dashboard to learn.
See our sales tax compliance services, check where you have obligations with the nexus calculator, or talk to us about Texas.
Official sources
- https://comptroller.texas.gov/taxes
- https://comptroller.texas.gov/taxes/voluntary-disclosure
- https://comptroller.texas.gov/taxes/publications
- https://comptroller.texas.gov/taxes/tax-policy-news/2026-january.php
- https://comptroller.texas.gov/webfile
Reviewed by Paul le Roux, CA(SA). Sales Tax Compliance USA handles US sales tax registration, filing and remittance for cross-border and domestic ecommerce sellers as a fully managed service.
This page is general information for educational purposes and does not constitute legal or tax advice. Sales tax rules change and depend on your specific facts. Consult a qualified tax professional about your own position.
Related guides
Other Texas guides: Economic nexus · Filing · Permit · Registration · Voluntary disclosure
Selling into several states? Check where you have crossed a threshold with the free nexus diagnostic, see the full 51-state threshold table, or browse every state guide.