Income Tax Errors and Fixes

Even the most careful filer slips up occasionally. The Income-tax Act, 1961 provides several explicit mechanisms to correct mistakes — revised returns, updated returns, rectification under Section 154, response to Section 143(1)(a) intimations, and appeal under Section 246A. Choosing the right tool for the specific error is what separates a clean tax record from a cascade of notices. This guide pairs common AY 2026-27 errors with their best legal remedies.

Error 1: Forgot to Report Interest Income

Bank interest, FD interest and savings account interest above ₹10,000 are commonly missed when filers rely only on Form 16. The fix depends on timing. If you spot the omission before the due date (31 July 2026 for most), file a revised return under Section 139(5). If discovered after a 143(1)(a) intimation, respond through the e-proceedings tab with corrected schedules. If discovered well after assessment, use an updated return under Section 139(8A) within 48 months.

Error 2: Wrong Personal Details — Bank Account, PAN, Address

Pre-validate your bank account on the e-filing portal before filing — a closed or unvalidated account is the single biggest cause of refund failure. If the wrong bank account was reported in the ITR, file a 'Refund Reissue Request' from the refund tab. For PAN-Aadhaar linkage failures, complete the linkage and reverify the return. Address changes follow the regular profile update flow.

Error 3: TDS Mismatch with Form 26AS / AIS

• Check whether the deductor has actually filed the TDS return — sometimes the credit appears late
• If the deductor has not filed, follow up directly; you cannot claim more TDS than appears in 26AS
• If 26AS shows TDS but ITR does not claim it fully, revise the return under Section 139(5)
• If ITR claims TDS not in 26AS, expect a 143(1)(a) intimation; respond with a corrected return

Error 4: Capital Gains Computation Mistakes

Capital gains errors are particularly common after the post-July 2024 holding-period and rate rationalisations. Common mistakes include: not applying grandfathering on listed equities acquired pre-31 January 2018, mixing up STCG (15%) and LTCG (12.5%) rates, missing indexation choice on pre-July 2024 real estate, and not netting brought-forward losses. The fix is invariably a revised return under Section 139(5) before 31 December 2026.

Error 5: Wrong Tax Regime Selected

If you chose the new regime by default and realised the old regime gave a higher refund (because of HRA, home loan interest, 80C), salaried taxpayers can switch in a revised return only if the original was filed on or before the due date. Business income filers are bound by their Form 10-IEA timing — a revised return cannot retroactively elect the old regime if 10-IEA was not filed in time.

Error 6: Claiming Wrong Deductions

1. Section 80C: only ₹1.5 lakh cumulative ceiling — check that PF, PPF, ELSS, life insurance and principal repayment together stay within the cap
2. Section 80D: senior citizen parent health insurance is ₹50,000, not ₹25,000
3. Section 24(b): self-occupied house interest is capped at ₹2 lakh; let-out property has no cap
4. Section 80G: only donations to entities with valid 80G registration in AY 2026-27 are eligible

Error 7: Schedule FA Omissions

Resident and ordinarily resident individuals must disclose every foreign bank account, financial interest, immovable property and beneficial interest in Schedule FA. Non-disclosure is a serious offence under the Black Money Act with penalty up to ₹10 lakh per asset and possible prosecution. If you missed it, file a revised return or an updated return immediately — voluntary disclosure substantially reduces the penalty exposure.

Error 8: Defective Return Under Section 139(9)

When the CPC sends a defective return notice — typically for wrong form, missing audit report, or missing balance sheet — you have 15 days to respond. Open the e-filing portal, navigate to the e-proceedings tab, upload the corrected form and validate. Failure to respond results in the return being treated as not filed, triggering belated-return consequences.

Conclusion

Every common ITR error has a legal remedy if you act in time. Revised return is your everyday tool; rectification under Section 154 handles apparent CPC errors; updated returns under 139(8A) cover historic omissions; response to 143(1)(a) intimations addresses pre-processing mismatches. Match the error to the remedy, act within the statutory window, and even a slip-up becomes a clean record entry.