Key Takeaways:
- Use 2025 forms and instructions for a 2025 return, even when reviewing it in 2026.
- An extension to file generally does not extend the time to pay.
- Match income, deductions, payments and account records before signing or amending.
This checklist concerns the 2025 tax return, reviewed October 26, 2026. Most calendar-year filers' ordinary 2026 filing deadlines have already passed, although individual relief or other rules can differ. If the return remains unfiled, establish the applicable deadline and payment position promptly rather than waiting for another tax season.
Confirm the return’s foundation
1. Verify the tax year, names, Social Security numbers and filing status. A household change can alter the appropriate treatment; do not carry last year's entries forward without checking.
2. Establish whether a return was already filed, accepted, extended or amended. Keep acceptance and payment confirmations. The IRS explains that extra time to file generally does not give extra time to pay tax owed.
3. Reconcile income documents. Match wages, interest, dividends, retirement distributions and other reportable income with statements. A missing form does not necessarily mean the income is excluded.
Check retirement-related entries
4. Review Form 1099-R information against what actually happened. A withdrawal, direct rollover and Roth conversion can have different reporting consequences. Obtain corrected documents or professional help when records disagree.
5. Confirm IRA contributions, the year designated and any nondeductible basis records. Eligibility, deductibility and reporting are separate questions. Do not assume a contribution is deductible simply because a custodian accepted it.
6. Check Social Security taxation using the applicable worksheet. The deposit received in the bank does not by itself establish the amount reportable or taxable.
Review deductions and credits
7. Compare the allowable standard deduction with eligible itemized deductions. Use 2025 rules, including applicable limits and documentation. A deductible expense and a tax credit do not reduce tax in the same way.
8. Review eligibility for the enhanced senior deduction and other relevant 2025 provisions. The senior deduction has age, income and other requirements; it is not an automatic $6,000 refund. Use the correct Schedule 1-A instructions rather than substituting a current-year rule or a slogan.
Close the payment and correction loop
9. Reconcile withholding and estimated payments with confirmations. For a hypothetical $7,000 liability and $6,200 of credited payments, the arithmetic difference is $800 before any applicable penalties, interest or other adjustments. A refund's size alone does not measure whether the return is correct.
10. Review bank details, signatures and supporting schedules. Save the filed copy and evidence. If a previously filed return needs a substantive correction, follow the IRS's amended-return guidance and consider any state-return implications.
Keep a written list of unresolved items for the preparer. Do not make up a missing number to complete the form; resolve the evidence or obtain guidance on the appropriate filing approach.
Sources and tools
- IRS Publication 17: Federal income tax rules for 2025
- IRS Publication 554: Tax guide for seniors
- IRS: Filing extensions and payment obligations
- IRS: Amended-return guidance
Related reading
General education for U.S. readers. Numerical examples are hypothetical, not forecasts or individual recommendations.
