Tax return review checklist: what a reviewer checks before filing

A reviewer is the person, other than the preparer, who checks a return before it goes out and signs off on each section. Without a written list, reviews drift toward the parts the reviewer likes to check. With one, every return gets the same pass, and gaps become a document request instead of a guess.

The stakes are personal for the preparer. Under section 6694, a preparer can face a penalty when an understatement comes from a position they knew, or should have known, was unreasonable (26 U.S.C. § 6694). A review that records why each position holds is the evidence the firm will want if that question is ever asked.

The checklist below runs in the order a return is built. Use it as the sign-off sheet in the workpapers, one copy per return.

Start with the file, not the return. Section 7216 makes it a crime for a preparer to knowingly or recklessly disclose or use return information for other purposes (26 U.S.C. § 7216). So any use beyond preparing the return needs the client’s consent on file. Check that the engagement letter for the year is signed too.

Then check identity. Names and taxpayer numbers should match the Social Security cards on file, and each dependent’s date of birth should match the records. Next, open last year’s return. Every carryover should come forward, such as capital losses, passive losses, charitable carryovers and depreciation.

The core of the review is the tie-out. A tie-out is the check that each source document was entered once, in the right place, for the right amount. Compare the input against the IRS wage and income transcript when you have one, because it lists the information returns the IRS received.

Credits carry their own duty. For the EITC, the child tax credits, the AOTC and head of household status, Form 8867 must be completed and the interview recorded (IRS, About Form 8867). The reviewer checks that the notes exist, not only that the form is attached. The Form 8867 due diligence checklist lists the records by credit.

Next, read the positions. Any item that depends on judgment, such as a home office or a vehicle percentage, should have support in the file. If support is thin, ask for it before filing, or document why the position meets the standard (26 U.S.C. § 6694).

Watch the deductions the 2025 law added for tax years 2025 through 2028, and test each condition rather than the cap alone (IRS, Tax deductions for working Americans and seniors). For tips, the cap is $25,000, it phases out above $150,000 of modified AGI or $300,000 joint, and employees of an employer in a specified service trade or business are excluded (IRS, Tax deductions for working Americans and seniors). For overtime, only the premium that FLSA section 7 requires counts, so pay for an exempt employee or overtime paid under company policy alone does not (IRS Fact Sheet FS-2026-13, qualified overtime compensation).

Then match each claimed amount to a statement. For example, look for the tip or overtime figure on the Form W-2, the Form 1099 or the employer’s separate statement, and keep that copy with the review sheet.

• Practitioner standards: Circular 230 is the set of Treasury rules for people who practice before the IRS, including due diligence and standards for return positions (IRS, Circular 230).
• Software diagnostics cleared, and every override explained in a note.
• State returns: residency, income allocation and credits for tax paid to other states.

The last section is mechanical, and it is where avoidable errors hide. You must receive the signed Form 8879 from the taxpayer before the return is transmitted (Form 8879). The firm keeps it for 3 years from the return due date or the IRS received date, whichever is later (Form 8879).

Check the refund account against a document from the client, such as a voided check, not against last year’s entry. Clear every open review note, then sign and date the review sheet.

1. Confirm consent and engagement letter on file.
2. Check identity, dependents and carryovers.
3. Tie out every source document and list what is missing.
4. Review credits, due diligence notes and positions.
5. Clear diagnostics and overrides; check the state return.
6. Collect the signed Form 8879, check the bank details, and sign off.

• 26 U.S.C. § 6694: Preparer penalty for understatements due to unreasonable positions: the greater of $1,000 or 50% of the income derived from the return.
• 26 U.S.C. § 7216: A preparer who knowingly or recklessly discloses or uses return information for other purposes commits a misdemeanor.
• IRS, About Form 8867: Paid preparer due diligence checklist for the EITC, CTC/ACTC/ODC, AOTC and head of household status.
• Form 8879: The ERO must receive the signed form before transmission and keep it 3 years from the due date or IRS received date, whichever is later.
• IRS, Circular 230: Circular 230 sets the rules for practice before the IRS.
• IRS, Tax deductions for working Americans and seniors: Tips and overtime deductions apply for 2025 through 2028; tips up to $25,000, phased out above $150,000 of modified AGI ($300,000 joint), with SSTB employees and self-employed SSTB owners excluded.
• IRS Fact Sheet FS-2026-13, qualified overtime compensation: Only overtime compensation required under section 7 of the FLSA qualifies; overtime not required by the FLSA is not eligible.