ITR filing 2026: Avoid these 8 costly mistakes before you submit your tax return
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ITR filing 2026: Why taxpayers need to be extra careful this year
More and more, the Income Tax Department is relying on AI and data analytics to detect mismatches in tax returns. At the same time, ITR forms for AY 2026-27 require additional disclosures in several areas. Filing your return early and carefully can help you avoid notices, delayed refunds and last-minute stress.
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ITR filing mistake #1: Claiming deductions and exemptions without proof
Claiming HRA, donations or other deductions without proper supporting documents can invite tax scrutiny. If you pay rent to parents or relatives, maintain rent agreements, payment records and ensure the rental income is reported in their ITR. Donations also require additional details such as transaction reference numbers and other prescribed information.
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ITR filing mistake #2: Not matching AIS, Form 26AS and your income
Before filing your return, reconcile your income and tax credits with AIS, Form 26AS and TIS. Differences in bank interest, dividends, TDS credits or other reported income can trigger automated notices. If you find incorrect entries in AIS, use the feedback facility on the income tax portal before filing your return.
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ITR filing mistake #3: Choosing the wrong ITR form
Using the wrong ITR form can make your return defective and delay processing. For example, taxpayers with foreign assets or higher equity capital gains may not be eligible to use ITR-1. Always choose the correct form based on your income sources, investments and tax reporting requirements.
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ITR filing mistake #4: Not reporting all sources of income
Many taxpayers forget to report bank interest, dividends, capital gains, foreign income or income from previous employers. Since the Income Tax Department cross-checks information from multiple sources, even small omissions can trigger compliance notices. Report every source of income, irrespective of the amount earned.
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ITR filing mistake #5: Incorrect reporting of capital gains
Capital gains reporting has become more complex after changes introduced in Budget 2024. Taxpayers should correctly classify gains as short-term or long-term, apply the relevant tax rules, and reconcile broker statements with AIS and mutual fund statements. Incorrect reporting may lead to excess tax or scrutiny.
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ITR filing mistake #6 and #7: Missing salary details or filing after the due date
If you changed jobs during FY 2025-26, include salary and TDS details from all employers while filing your return. Also, don't miss the applicable due date—July 31 for most individual taxpayers using ITR-1 and ITR-2, and August 31 for eligible non- audit taxpayers filing ITR-3 or ITR-4. Late filing can attract penalties and restrict tax regime choices.
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ITR filing mistake #8: Forgetting to verify your income tax return
Submitting your ITR is not the final step. You must verify your return within the prescribed time limit for it to be treated as valid. An unverified return may be considered invalid, which can delay processing and impact your ability to claim certain tax benefits. Completing e-verification immediately after filing takes only a few minutes.
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ITR filing checklist: Simple steps to avoid notices and delays
Before submitting your return, verify AIS and Form 26AS, choose the correct ITR form, report every source of income, keep documents ready for deductions, disclose capital gains correctly, file before the due date and complete e-verification. Spending a little extra time now can help you avoid notices, penalties and refund delays later.