Implementing tax return review procedures

Tax return review procedures are no longer a “nice to have” in a tax practice. They’re a core risk management tool. With increased IRS enforcement activity and continued preparer penalty exposure under §§6694 and 6695, a consistent review process helps protect both the taxpayer and the preparer.

A solid review framework doesn’t need to be complicated, but it does need to be intentional. The goal is accuracy, compliance and documentation. When done correctly, a review process reduces errors, supports reasonable cause and strengthens audit defense. 

Why tax return reviews matter

The Internal Revenue Code and related regulations place responsibility squarely on paid preparers to exercise due diligence. Circular 230 §10.22 likewise requires practitioners to exercise due diligence in preparing returns and in determining the correctness of representations made to the IRS. These expectations apply throughout the preparation and filing process, not just at signature.

A structured review helps identify errors before filing, particularly in high-risk areas that often draw IRS scrutiny. It also creates a record showing the firm followed established procedures, which can be critical if a return is later examined or a preparer penalty is proposed.

Building an effective review framework

An effective tax return review process starts with consistency. Every return should move through the same core steps, even if the complexity varies.

First, confirm basic taxpayer information. Filing status, dependents, Social Security numbers and prior-year carryovers should match source documents and prior returns. Simple mismatches are common and easily preventable.

Next, focus on income completeness. Review Forms W-2, Wage and Tax Statement, Forms 1099 and Schedule K-1 entries to ensure all reported income aligns with documents provided. Missing income is a common trigger for IRS notices and audits. 

Then examine deductions and credits closely. This is where due diligence matters most. Credits such as the earned income credit, child tax credit and education credits require specific eligibility tests and documentation. Preparers must complete Form 8867, Paid Preparer’s Due Diligence Checklist, and retain required documentation under §6695(g).

Required documentation and substantiation

IRS substantiation rules are clear. Taxpayers must maintain records sufficient to establish income, deductions and credits. Preparers should mirror that standard in their files.

A complete review file typically includes source documents provided by the taxpayer, written notes documenting questions asked and responses received, and any worksheets used to calculate credits or limitations. Engagement letters and organizers also play an important role.

Documentation should reflect not just what was reported, but why. If a position could be questioned, the file should show the preparer evaluated the facts and applied the law appropriately.

Common preparer errors and high-risk areas

Certain issues appear repeatedly in IRS exams and penalty cases. These include unsupported dependents, improper filing status claims, inflated charitable contributions and incorrect business expense deductions.

Schedule C, Profit or Loss from Business (Sole Proprietorship), returns deserve special attention. Net losses, vehicle expenses and home office deductions often attract scrutiny. Reviewers should confirm that expenses are ordinary, necessary and properly documented.

Another risk area involves credits subject to heightened due diligence requirements, like the earned income credit. Failure to complete required forms, ask follow-up questions or retain documentation can lead to penalties even if the credit itself is ultimately allowed.

Documenting the review process

A review checklist can be a powerful tool. It ensures each return is reviewed against the same standards and creates a record of compliance. The checklist should be completed and retained with the return file.

Document who performed the review, when it occurred and any issues identified and resolved. Clear documentation supports reasonable cause arguments and demonstrates the firm exercised ordinary business care.

Investing in stronger review practices

Tax return reviews protect your clients, your firm and your reputation. They reinforce accuracy, support compliance and reduce the risk of costly penalties.

To help tax professionals strengthen their review procedures, NATP is offering a live webinar, Implementing Tax Return Review Procedures, on March 5, 2026 (also available on demand). This session will walk through practical review frameworks, IRS compliance expectations and documentation best practices you can apply immediately in your practice. Join NATP to build confidence in your review process and reduce risk before the return is filed.