Why Your Tax Return Is Under Review by the IRS

Legal Guide Team

Your tax return can be selected for review for several legitimate reasons. While most reviews are routine and resolved quickly, some investigations can take longer. Understanding common triggers, the review process, and what to do can help taxpayers respond effectively and minimize delays.

Causes Of A Tax Return Review

Several factors can trigger an IRS review or audit. These include discrepancies between the information reported on the return and third-party data, unusual or large refunds, and claim patterns that require additional verification. Common triggers include mismatched income reported on W-2s or 1099s, excessive deductions relative to income, credits with significant risk of error (such as the Earned Income Tax Credit or American Opportunity Credit), and suspected identity theft or fraud.

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Identity theft is a frequent reason for reviews. If someone else used your Social Security number to file a return, the IRS may pause processing to prevent improper refunds. Similarly, returns with signs of identity theft or suspicious activity often receive more scrutiny to protect taxpayer dollars.

Mathematical or clerical errors can prompt a review. Simple mistakes like incorrect social security numbers, filing statuses, or math miscalculations can cause the IRS to request clarifications or supporting documents. In some cases, large or unusual deductions, credits, or losses raise red flags and necessitate explanation.

How The IRS Determines If A Return Needs Review

The IRS uses a combination of automated screening and human review. A computer-based processing system flags discrepancies or anomalies for further examination. If a return triggers an audit code, a service center or local IRS examiner may review it. The decision can be influenced by data from employers, financial institutions, and other tax forms filed with the IRS.

Not all flagged returns become audits. Some may require only a quick verification of documents or a minor adjustment. The IRS often requests additional information through letters, such as a Request for More Information (CP letters) or a Notice of Adjustment. Responding promptly with complete documentation can expedite resolution.

What To Do If Your Return Is Under Review

Receiving a notice means it’s time to act. Read the letter carefully for what is being requested, how to respond, and the deadline. Always respond by the date shown to avoid further delays or penalties.

Prepare and submit the requested documentation, which may include W-2s, 1099s, receipts for deductions, or explanations for large transfers or unusual entries. If you’re unsure what’s needed, consider seeking help from a tax professional or utilize IRS resources such as the “Help With My Return” tools on IRS.gov.

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Keep copies of everything you send and consider sending documents via traceable methods if feasible. If you cannot meet a deadline, contact the IRS to request more time and keep records of that communication. Avoid calling the largest hotlines without a clear purpose; use the specific correspondence or the IRS.gov contact options referenced in the notice.

Timeline And Notices

Review timelines vary. Some reviews conclude within a few weeks, while others may take several months, especially if extensive documentation is required or if data verification is complex. The IRS typically communicates via formal notices rather than phone calls for official actions, and taxpayers should monitor their accounts and mail for updates.

Notices may include a CP or Letter indicating required documents, changes to the refund amount, or an audit determination. The timing often depends on the volume of returns and the complexity of the case. Responding promptly and ensuring completeness can shorten the timeline.

How To Avoid Future Reviews

Proactive steps reduce the likelihood of a review. Accurate reporting and thorough documentation are essential. Verify Social Security numbers, names, and addresses on all forms, and cross-check that the reported income matches W-2s and 1099s on file. If you claim credits with strict eligibility rules, ensure you meet all requirements and retain documentation that supports eligibility.

File early to minimize processing backlogs and potential mismatches. Use electronic filing with direct deposit when possible, which tends to have fewer errors than paper filing. If you have significant life changes—such as education expenses, homeownership, or business income—keep organized records and consider consulting a tax professional for accuracy.

For identity theft protection, enable alerts with your financial institutions and monitor your credit. If you suspect fraud, contact the IRS Identity Theft Central and follow guidance to secure your information and restore your tax filing integrity.

Resources And Next Steps

  • IRS Website: Access specific notices and instructions at IRS.gov, including the “Help With My Return” and “Where’s My Refund” tools.
  • Identity Theft: If identity theft is suspected, use the IRS Identity Theft Central for guidance and essential steps to protect your account.
  • Documentation: Gather and organize W-2s, 1099s, receipts, and records of credits claimed to streamline any required review.
  • Tax Professional: Consider consulting a CPA or enrolled agent for complex cases, especially when multiple years or substantial credits are involved.

Understanding why a tax return is under review helps taxpayers respond efficiently and reduces unnecessary delays. By addressing IRS requests promptly, maintaining accurate records, and applying best practices for filing, taxpayers can navigate reviews with confidence and clarity.