Updated Return (ITR-U) Under Section 139(8A): Who Can File, the 48-Month Window and Key Limits

Every filing season throws up the same quiet panic: a Form 26AS entry you never declared, an interest certificate that surfaces after the due date, or a capital gain you simply forgot. Until 2022 the only remedy was a revised return under Section 139(5) - and that door shuts on 31 December of the assessment year. The updated return (ITR-U) under Section 139(8A), inserted by the Finance Act 2022 with effect from 1 April 2022 and widened by the Finance Act 2025, now gives you as long as forty-eight months to come clean, provided you pay the additional income-tax the law attaches to that second chance.

This piece walks through exactly who can use Section 139(8A), the four time windows that decide your cost, and the hard limits that stop ITR-U from becoming a refund route. Use our income tax calculator to size the base liability before you layer on the additional tax below.

The Scenario

Picture Meera, a salaried professional who filed her original return for FY 2023-24 (assessment year 2024-25) on time in July 2024. In March 2026 her bank issues a consolidated statement showing Rs 2,50,000 of consultancy income received in FY 2023-24 that never entered her ITR. The revised-return window under Section 139(5) closed on 31 December 2024, and the belated-return window closed the same day. She has missed both by more than a year.

Her instinct is to wait for a notice. That is the expensive path: once the Assessing Officer issues a notice under Section 148 or 143(2), the voluntary route usually closes, and concealment can attract a penalty of 50% to 200% of tax sought to be evaded under Section 270A. Meera's better option is Section 139(8A), which lets her disclose the Rs 2,50,000 herself, before any assessment year proceeding starts, and settle the matter by paying tax plus a graded additional levy.

Statutory Answer

Section 139(8A) of the Income-tax Act 1961 permits any person - whether or not they filed an original return under Section 139(1), a belated return under 139(4), or a revised return under 139(5) - to furnish an updated return for the relevant assessment year. The Finance Act 2025 extended the outer limit from twenty-four months to forty-eight months from the end of the relevant assessment year. For Meera's assessment year 2024-25, which ended on 31 March 2025, the last date to file ITR-U is therefore 31 March 2029.

The additional income-tax payable is governed by Section 140B, and the rate rises the longer you wait. The Central Board of Direct Taxes prescribes four windows measured from the end of the relevant assessment year:

The 60% and 70% tiers are new, introduced by the Finance Act 2025 to accompany the longer window; before that, only the 25% and 50% tiers existed for the original twenty-four-month period. This "additional tax" sits on top of the ordinary tax, the cess of 4%, and any interest under Sections 234A, 234B and 234C.

Three statutory limits define what an updated return cannot do. Under the provisos to Section 139(8A), an ITR-U cannot be filed if it (a) is a return of loss, (b) has the effect of decreasing the total tax liability determined on the basis of a return furnished earlier, or (c) results in a refund or increases the refund already due. In short, ITR-U is a one-way street: it can only add income and raise tax, never trim it or generate a tax refund.

Two further bars apply. Only one updated return is permitted per assessment year - you cannot keep amending. And ITR-U is blocked where a search under Section 132, a requisition under Section 132A, or a survey under Section 133A (other than 133A(2A)) has been initiated against you for the relevant year, or where assessment, reassessment, revision or recomputation is pending or completed for that year.

Worked Resolution

Return to Meera and her omitted Rs 2,50,000. Assume her other income already places this slice in the 20% marginal band. Her base recomputation, using the FY 2025-26 framework she must apply for the year in question, looks like this:

The Section 140B additional tax then applies to that Rs 64,480 aggregate, and the total she remits with her ITR-U depends entirely on when she files:

The lesson is stark: filing in the fourth year costs Meera Rs 29,016 more than filing in the first, purely because the additional-tax rate climbs from 25% to 70%. Because she surfaced the income in March 2026, filing before 31 March 2026 caps her additional tax at 25%, so her total outlay is Rs 80,600 rather than the Rs 96,720 she would owe just weeks later on 1 April 2026.

Mechanically, Meera files ITR-U by completing Part A General 139(8A) - where she ticks the applicable window and the reason for updating - and Part B ATI (Additional Tax on Updated Income), which computes the Section 140B levy. She must pay the full amount, including the additional tax, before filing; an ITR-U without proof of payment is treated as defective. Salaried filers comparing regimes before recomputing can run the numbers through our old vs new regime calculator, and anyone reconciling deducted tax should check the TDS calculator against Form 26AS.

One practical caution: the additional tax is not deductible and cannot be reduced by fresh claims. You cannot use ITR-U to belatedly claim a deduction under Chapter VI-A, carry forward a loss, or switch to a more favourable regime if that lowers your liability, because each of those would breach the "no decrease in tax" proviso. ITR-U is a settlement mechanism for under-reported income, not a planning tool.

FAQ

Can I file ITR-U if I never filed an original return at all?

Yes. Section 139(8A) explicitly applies "whether or not" you furnished a return under Section 139(1), 139(4) or 139(5). A complete non-filer can file an updated return for the relevant assessment year, subject to the same 48-month limit and the Section 140B additional tax of 25% to 70%. This is often the only route left once both the belated and revised windows have closed on 31 December of the assessment year.

What is the last date to file ITR-U for assessment year 2024-25?

The forty-eight-month limit runs from the end of the relevant assessment year. Assessment year 2024-25 ended on 31 March 2025, so the outer date to file an updated return is 31 March 2029. The cost tiers, however, step up every twelve months - 25% up to 31 March 2026, 50% up to 31 March 2027, 60% up to 31 March 2028, and 70% up to 31 March 2029.

Can an updated return increase my refund?

No. One of the three provisos to Section 139(8A) expressly prohibits an ITR-U that results in a refund or increases a refund already claimed. If your correct figures would produce a refund, Section 139(8A) is not available to you; you would need to pursue condonation of delay under Section 119(2)(b) instead. ITR-U can only add income and increase tax.

How many times can I file an updated return for one year?

Only once. Section 139(8A) permits a single updated return per assessment year. Once you have furnished an ITR-U for, say, assessment year 2024-25, you cannot file a second updated return for the same year even if you discover further omitted income later, so reconcile Form 26AS and the Annual Information Statement fully before you file.

Does ITR-U let me carry forward a loss I missed reporting?

No. An updated return cannot be a return of loss, and it cannot have the effect of reducing your tax liability. Carrying forward a fresh loss would breach both limbs, so Section 139(8A) is closed to loss claims. Losses must be reported in a return filed within the original due date under Section 139(1) to be eligible for carry-forward.

Is ITR-U available if I have received a notice under Section 148?

Generally no. If assessment, reassessment or recomputation proceedings are pending or completed, or a search under Section 132 or survey under Section 133A has been initiated for that year, the Section 139(8A) route is barred. The updated return is designed for voluntary disclosure before the department acts, which is why filing early - and paying the 25% tier - is almost always cheaper than waiting.

How is the additional tax under Section 140B actually computed?

Section 140B computes the additional income-tax as 25%, 50%, 60% or 70% of the aggregate of the tax and interest payable on your updated income, after crediting any advance tax, TDS, TCS and relief already accounted for. The cess of 4% is built into the tax figure first; the Section 140B percentage then applies to the tax-plus-interest total, as shown in Meera's worked table above.