Missed reporting some income? Can you still file an updated return (ITR-U) under Section 139(8A)?

You reconcile your bank statements in July 2026 and spot it: a Rs 3,00,000 fixed-deposit interest credit and a small equity capital gain that never made it into the return you filed for the year. The belated-return window under Section 139(4) has closed, the revised-return window under Section 139(5) has closed, and yet the omission is sitting in your Annual Information Statement for anyone at the Central Board of Direct Taxes to see. Section 139(8A) of the Income-tax Act, 1961 exists for exactly this moment, and this Q&A walks through who can use it, by when, and at what cost under the FY 2025-26 rules.

The Scenario

Picture Meera, a salaried professional in Pune. For the tax year 2025-26 (assessment year 2026-27) she filed her income-tax return on time on 30 July 2026 declaring a taxable income of Rs 14,00,000 under the new regime. Three items never made it in: Rs 2,00,000 of fixed-deposit interest, Rs 60,000 of savings-bank and bond interest, and a Rs 40,000 short-term equity gain — Rs 3,00,000 in all. None of it was hidden deliberately; the interest simply arrived on instruments she had forgotten, and her Annual Information Statement captured every rupee through the reporting entities.

The instinct is to "revise" the return, but Section 139(5) only permits a revised return up to 31 December of the assessment year or before the assessment is completed, whichever is earlier — a door that shuts fast. Meera's real question is the one thousands of taxpayers ask each August: with the ordinary windows closed, can she still come clean, and what will voluntary disclosure cost versus waiting for a notice? The answer since the Finance Act, 2022, and now widened by the Finance Act, 2025, is the updated return, or ITR-U.

Statutory Answer

Section 139(8A) of the Income-tax Act, 1961 lets any person file an updated return of income, whether or not an original return under Section 139(1), a belated return under Section 139(4) or a revised return under Section 139(5) was furnished earlier. Per the Income Tax Department's Income Tax Returns help pages, an updated return can be filed within 48 months from the end of the financial year succeeding the relevant tax year — that is, 48 months from the end of the assessment year. The Finance Act, 2025 extended this window from the earlier 24 months, and the tax on the updated return is charged under Section 140B of the same Act.

Three statutory guard-rails decide whether ITR-U is even available to you. The official ITR-U facility confirms that an updated return cannot be used to reduce your total tax liability, cannot increase your refund, and cannot result in an enhanced or newly claimed loss. So ITR-U is a one-way street built for paying more, never for clawing money back. The department also confirms that only one updated return may be filed per tax year — there is no second bite, so the figures must be right the first time.

The provision carries further bars written into Section 139(8A) itself. You cannot file an updated return for a year in which a search under Section 132 or a requisition under Section 132A has been initiated, nor where assessment, reassessment, recomputation or revision proceedings are pending or completed, nor once a notice for reassessment under Section 148 has been issued for that year. In short, ITR-U rewards those who move before the department does. Under the new Income-tax Act, 2025 — in force from 1 April 2026 — the same facility continues, with the additional income-tax now prescribed under Section 267, as noted on the department's own returns help page, but the design (48 months, tiered extra tax, one filing) is unchanged.

Worked Resolution

The cost of ITR-U has two layers: the ordinary tax and interest on the omitted income, and then a penal additional income-tax under Section 140B stacked on top. That top layer rises the longer you wait, on a four-step ladder introduced in stages by the Finance Act, 2022 (the first two rungs) and the Finance Act, 2025 (the last two).

Now run Meera's Rs 3,00,000 through it under the new-regime slabs for FY 2025-26. Her declared income was Rs 14,00,000, which sits in the 15% band (Rs 12,00,000 to Rs 16,00,000). Adding Rs 3,00,000 lifts her total to Rs 17,00,000, so the extra income is taxed marginally: the slice from Rs 14,00,000 to Rs 16,00,000 at 15% is Rs 30,000, and the slice from Rs 16,00,000 to Rs 17,00,000 at 20% is Rs 20,000. That is Rs 50,000 of additional base tax, plus health and education cess at 4%, or Rs 2,000, for Rs 52,000 before any interest. You can reproduce this on the income tax calculator and the new-regime calculator.

If Meera files her ITR-U within 12 months of the end of assessment year 2026-27 — that is, by 31 March 2028 — the Section 140B additional tax is 25% of the aggregate of that tax and interest. On the Rs 52,000 base (before the Section 234A/234B/234C interest the e-filing utility computes), the extra levy is Rs 13,000, taking the illustrative outgo to roughly Rs 65,000. Wait longer and the same Rs 52,000 base attracts a heavier top-up, as the table below shows.

The gap between the top and bottom rows is Rs 23,400 on the same Rs 3,00,000 omission — a direct reward for filing early. Note too that the tax and interest must be paid as self-assessment tax before the ITR-U is validated; a proof of payment challan is mandatory, and an updated return filed without full payment is treated as defective. Because the Rs 40,000 short-term equity gain in Meera's case is taxed at 20% under Budget 2024 rules, taxpayers with listed-security omissions should first quantify the gain on the capital gains calculator before totalling the Section 140B liability.

One contrast is worth drawing for lower earners. Under the new regime for FY 2025-26, a resident with total income up to Rs 12,00,000 pays nil tax because of the Section 87A rebate of up to Rs 60,000, and the standard deduction for salaried taxpayers is Rs 75,000. If a modest omission still leaves total income at or below Rs 12,00,000, the additional base tax can be zero — but remember that ITR-U can never reduce a liability already declared, so it is only worth filing when the correction genuinely adds tax. Use the advance-tax calculator to check whether your corrected figure also triggers a shortfall for the year.

FAQ

Can I file ITR-U if I never filed an original return for that year?

Yes. Section 139(8A) expressly applies "whether or not" you furnished an original, belated or revised return, and the Income Tax Department's returns help page confirms an updated return can be filed in either case. A non-filer who should have declared income can regularise the year through ITR-U within the 48-month window, paying the base tax, interest and the Section 140B additional tax that applies to the tier in which they file.

Will ITR-U increase my refund if I add a TDS credit I forgot to claim?

No. The statute is explicit that an updated return cannot increase your tax refund and cannot reduce your total tax liability. If your only correction is an unclaimed TDS credit that would enlarge a refund, ITR-U is not the route — that is precisely the kind of relief Section 139(8A) is designed to exclude. Check the credit first against your Form 26AS and AIS.

How many times can I use ITR-U for the same year?

Once. The Income Tax Department confirms that only one updated return is permitted per tax year. There is no facility to revise an ITR-U, so every figure — the added income, the base tax, the interest and the Section 140B top-up — must be settled before you submit for that assessment year.

Does filing ITR-U stop a Section 148 reassessment notice?

Only if you get in first. Section 139(8A) bars an updated return for any year in which a notice under Section 148 has already been issued, or where assessment, reassessment or revision proceedings are pending or completed. Voluntary disclosure works because it precedes departmental action; once the notice lands, the ITR-U door for that year is shut and the matter proceeds under the reassessment provisions.

Which past years can I still update as of August 2026?

Because the window is 48 months from the end of the assessment year, a year such as FY 2022-23 (assessment year 2023-24, which ended on 31 March 2024) remains open until 31 March 2028. As of 3 August 2026 that year sits in the "after 24 and up to 36 months" band, so an ITR-U for FY 2022-23 filed today attracts the 60% additional-tax rate under Section 140B — a reminder that the ladder keeps climbing while you deliberate.

Do I have to pay the tax before I file, or can I pay later?

You pay first. The additional tax and interest — including interest under Sections 234A, 234B and 234C — must be discharged as self-assessment tax, and the challan details are entered into the ITR-U before submission. An updated return unaccompanied by proof of full payment is treated as defective, so budget the whole liability, from base tax to the Section 140B levy, before you begin.

Is the 48-month rule the same under the new Income-tax Act, 2025?

Yes in substance. The Income-tax Act, 2025, effective 1 April 2026, carries the updated-return facility forward with the same 48-month outer limit and tiered additional tax, with the extra levy now prescribed under Section 267 as the department's returns help page notes. Taxpayers correcting older years under the 1961 Act and current years under the 2025 Act face the identical 25% to 70% cost ladder.