Refunds, AIS mismatches and filing mistakes: every question, answered
Refund delays, AIS/26AS mismatches, revised returns, ITR-U and wrong-regime mistakes.
Last updated 2026-06-12 · Covers FY 2025-26 and FY 2026-27
Plain-language answers, reviewed for publication.
Each question has a shareable anchor, a verdict-first answer, and links into the calculators, calendar, glossary or sibling guide pages where relevant.
Refund delays usually come from processing, bank validation, mismatch or demand-adjustment issues. Check return processing status, bank validation, refund reissue options and outstanding demands before raising a grievance.
2What does refund reissue mean?
Refund delays usually come from processing, bank validation, mismatch or demand-adjustment issues. Check return processing status, bank validation, refund reissue options and outstanding demands before raising a grievance.
3Can a refund be adjusted against old demand?
Refund delays usually come from processing, bank validation, mismatch or demand-adjustment issues. Check return processing status, bank validation, refund reissue options and outstanding demands before raising a grievance.
B · AIS and 26AS mismatches
4AIS shows wrong income — should I still file?
AIS is an information statement; 26AS is the older tax-credit and transaction view. Wrong AIS data should be responded to with feedback and evidence, but the return should still report your correct income position.
5What is the difference between AIS and Form 26AS?
AIS is an information statement; 26AS is the older tax-credit and transaction view. Wrong AIS data should be responded to with feedback and evidence, but the return should still report your correct income position.
6How do I give AIS feedback?
AIS is an information statement; 26AS is the older tax-credit and transaction view. Wrong AIS data should be responded to with feedback and evidence, but the return should still report your correct income position.
C · Return mistakes
7I selected the wrong regime — can I fix it?
Many filing mistakes can be fixed with a revised return if the revision window is open. Regime-choice correction is rule-bound, especially for business/profession income, so check the year's return rules before assuming it can be changed.
8When can I file a revised return?
Many filing mistakes can be fixed with a revised return if the revision window is open. Regime-choice correction is rule-bound, especially for business/profession income, so check the year's return rules before assuming it can be changed.
9What if I forgot to report bank interest?
Many filing mistakes can be fixed with a revised return if the revision window is open. Regime-choice correction is rule-bound, especially for business/profession income, so check the year's return rules before assuming it can be changed.
D · ITR-U and notices
10When is ITR-U useful?
ITR-U is mainly for updating income where additional tax is payable, not for creating a refund. It has time limits and extra tax mechanics, so use it only when revised/belated routes are unavailable and the case fits.
11Can I use ITR-U to claim a refund?
Refund delays usually come from processing, bank validation, mismatch or demand-adjustment issues. Check return processing status, bank validation, refund reissue options and outstanding demands before raising a grievance.
12What if a notice comes after I revised my return?
Many filing mistakes can be fixed with a revised return if the revision window is open. Regime-choice correction is rule-bound, especially for business/profession income, so check the year's return rules before assuming it can be changed.
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This guide is general information for understanding the topic, not advice on your specific situation, and not solicitation of work. Tax positions turn on your full facts and on the law in force for the relevant year. Confirm your position with a qualified professional before acting.