Texas Sales Tax Audit Timeline and Taxpayer Rights

A practical walkthrough of the Texas Comptroller audit process, key deadlines, and the rights that help you stay in control. 

A Texas sales tax audit timeline can feel complex because the process moves in stages, and the most important leverage points often arise early before results are finalized. The Texas Comptroller outlines its audit process in a structured sequence, including notice, entrance conference, fieldwork (which may involve sampling), exit conference, review, and issuance of audit results.  

 This guide breaks down that process in plain language and highlights the taxpayer rights that matter most during an audit, including the right to representation and the right to contest a determination. 

Texas sales tax audit timeline at a glance 

The typical flow of a Texas sales and use tax audit follows the Comptroller's published process and includes the key stages outlined above. 

Notice of audit and entrance conference 

Texas begins the audit process by issuing a notice by mail and requesting a completed Audit Questionnaire. The Comptroller indicates that an entrance conference is scheduled after the questionnaire is received. If the questionnaire is not returned on time, follow-up contact may occur and liability may be assessed if there is no response.  

This phase sets the pace and scope of the audit. The entrance conference is a formal discussion designed to establish an efficient audit plan. In practice, this is a key opportunity to: 

• Clarify your business model and how your systems generate sales and tax data Identify available electronic records and how they can be produced clearly  
• Flag system changes (e.g., POS or ERP transitions) so testing periods are representative  
• Establish a single point of contact to avoid inconsistent communication 

A practical step is to prepare a one-page audit index showing where key records are located—sales invoices, exemption certificates, purchase invoices, bank statements, and return workpapers—organized by filing period. 

You can create a free account with Sales Tax Helper to help you prepare an audit-ready intake packet (record index, system map, reconciliation outline, and response plan) so your first submissions reduce questions instead of triggering expanded requests. 

Documentation and record requests during fieldwork 

Texas makes clear that auditors may examine books and records to verify tax accuracy, and taxpayers are required to provide supporting documentation. This includes sales invoices with exemption support, purchase invoices and fixed asset records, ledgers and journals, bank statements, return workpapers, and electronic data where available. 

Two practical realities drive results during this phase: 

1. Records determine whether Texas can verify or must estimate. 
2. If transactions cannot be supported, they may be treated as taxable or included in sampling error rates.  
3. Your opportunity to dispute begins before results are finalized. 
4. After fieldwork, Texas provides schedules identifying potential adjustments and allows time to submit additional documentation. This is the stage to provide missing certificates, corrected invoices, or transaction-level support—not broad arguments.  

High-performing audit responses typically use an issue tracker: 

• Issue name (e.g., exempt sales, local tax, use tax)  
• Auditor schedule reference  
• Identified issue or missing support  
• Supporting evidence (file references, transaction lists)  
• Explanation (concise and specific)  
• Status and submission date 

This creates a clear record and reduces miscommunication later in the audit. 

Sampling: when it appears and why it changes everything 

Texas states that transactions may be reviewed in full or through sampling, and if sampling is used, the auditor explains how errors are projected. 

Sampling is often the point where small documentation gaps become large assessments, because identified errors may be projected across multiple periods. 

To manage this risk: 

• Identify non-representative periods (seasonality, promotions, system changes)  
• Separate populations where possible (locations, channels, product lines)  
• Address exemption certificate gaps early  
• Prepare reconciliations so variances are not treated as taxable 

If sampling is likely, early preparation matters. The ability to produce clean, structured data can influence whether the audit remains targeted or becomes heavily estimated. 

You can create a free account with Sales Tax Helper to build a sampling-ready documentation set and reconciliation package, so projected errors reflect reality, not record gaps. 

Exit conference, review, and the notification of results 

After documentation review, the auditor conducts an exit conference to present findings, including proposed assessments, penalties, and interest. Taxpayers may request additional discussions, such as reconciliation or independent review conferences, if disagreements remain.  

The audit is then reviewed internally, and a formal notification of results is issued. 

At this stage: 

• Ensure all disputed issues are supported with submitted documentation  
• Request additional review if needed before results are finalized  
• Clarify any remaining gaps identified by the auditor  

Once the notification of results is issued, the process becomes deadline-driven. 

Your taxpayer rights in a Texas sales tax audit 

Texas publishes a Taxpayer Bill of Rights. Several rights directly affect audit outcomes: 

• Right to pay only what you owe (Texas states staff are not paid, promoted, or rewarded based on amounts collected or assessed). 
• Right to representation (Texas recognizes audits can be intimidating and taxpayers may engage a person of their choice to represent them).  
• Right to contest a decision (Texas acknowledges issues may not be resolved during audit and points taxpayers to the Comptroller’s contesting publication).  
• Right to request a waiver of penalties (Texas says it will consider waiving penalties in certain circumstances, including first-time audit situations). 

These rights matter because they change how you should behave during the audit: 

• You should not assume the auditor’s first position is final. 
• You should document disagreements respectfully and early. 
• You should use representation if communications are becoming inconsistent, or if you need help managing deadlines and evidence. 
• You should treat penalty strategy as a parallel workstream, not an afterthought. 

Deadlines and dispute options: Statement of Grounds and redetermination 

Texas is clear that there are formal steps to contest audit results. 

To contest an assessment without payment, taxpayers generally must timely submit a Statement of Grounds or other required protest documentation by the deadline stated in the Comptroller’s notice.  

Separately, Texas law provides that a petition for redetermination must be filed within 60 days after the notice of determination is issued or the determination becomes final.  

Texas also offers a Managed Audit Program, which must be requested early—generally within 60 days of the Audit Notification Letter—and requests may be denied once fieldwork has begun.  

The takeaway is simple: Texas gives you tools, but Texas also expects you to move fast and meet deadlines exactly. 

If you are approaching an audit results notice, you can create a free account with Sales Tax Helper to help you organize a dispute-ready package and deadline plan so your disagreement is clear, supported, and timely. 

How To Protect Yourself 

 To stay in control of a Texas sales tax audit timeline, focus on the following: 

1. Lock down the timeline: identify your current stage (notice, fieldwork, exit, or results) and calendar all deadlines that affect your options  
2. Build an audit index: organize records by period and category so responses are consistent and easy to produce, including electronic data where required  
3. Strengthen your rights posture: determine who will communicate with the auditor, whether representation is appropriate, and how disagreements will be documented  
4. Resolve issues early: use the time provided after proposed schedules to submit missing documentation and address adjustments before they are finalized  
5. Prepare for disputes in advance: begin drafting your Statement of Grounds and organizing exhibits before formal deadlines begin 

FAQ 

How long do I have to keep records for a Texas sales tax audit? 

Texas states you must keep sales and use tax records for at least four years, and if you are being audited you should retain records for the audited period until the audit is completed. If you appeal or file a refund claim, retain records until the case is resolved. 

What happens if I do not return the audit questionnaire? 

Texas states the auditor schedules the entrance conference upon receipt of the completed questionnaire, and if it is not returned on time a second questionnaire is mailed and the auditor may contact by phone; Texas also notes liability may be incurred if there is no contact. failure to respond may result in estimated assessments or other enforcement actions. 

Will Texas use sampling in my sales tax audit? 

Texas states transactions are examined either in their entirety or by sampling during fieldwork, and if a sample is performed the auditor notifies the taxpayer and explains how errors are projected.  

What are my rights during a Texas sales tax audit? 

Texas’s Taxpayer Bill of Rights includes the right to representation, the right to contest a decision, and the right to request a waiver of penalties, among other protections.  

How do I contest audit results without paying first? 

Texas states a mailed Statement of Grounds outlining disputed items must be received by the deadline on the Audit Notification to contest the assessment without paying. 

What is the redetermination deadline in Texas? 

Texas law provides a petition for redetermination must be filed within 60 days after the notice of determination is issued, or the determination becomes final.  

Is a managed audit an option? 

Texas states that managed audit requests should be received within 60 days of the Audit Notification Letter date and will be denied if fieldwork has already begun.  

Next Steps 

 If you are currently in a Texas sales tax audit, the most effective way to reduce stress and financial exposure is to take control of the timeline and the flow of records before sampling, projections, or deadline-driven disputes shape the outcome. 

By creating a free account with Sales Tax Helper, you can organize audit-ready documentation, strengthen exemption and resale support, identify purchase-side use tax exposure, and build clear reconciliations that make your reporting easier to verify. This allows you to manage each stage of the audit with greater clarity and control.