Summary: The updated income-tax return mechanism under section 139(8A) of the Income-tax Act, 1961 permits eligible taxpayers to disclose omitted income for specified earlier assessment years within 48 months after the relevant assessment year ends. As of 12 October 2026, the four currently relevant completed assessment years AY 2022-23 through AY 2025-26 fall in different additional-tax bands: 70%, 60%, 50% and 25% respectively, subject to the precise filing date. Section 140B requires payment of ordinary tax, applicable interest and additional income-tax before submission. An ITR-U cannot generally be used to reduce liability, increase a refund or submit a loss return, and separate bars apply to assessment proceedings, search-related cases and specified information or notices. The Income-tax Act, 2025 does not replace the 1961 Act for returns relating to earlier assessment years. This guide distinguishes the statutory opportunity from eligibility restrictions, explains calculations and outlines evidence and e-filing controls.
Why the ITR-U window matters in October 2026
A tax return filed on time is not always complete. A taxpayer may later discover omitted bank interest, capital gains, professional receipts, a mismatch in a reported sale, or an income item identified during reconciliation with the Annual Information Statement. The updated return, commonly called ITR-U, is a statutory disclosure route for certain omissions; it is not a second opportunity to choose a more favourable tax position. Its usefulness in October 2026 comes from the four-year period introduced through the Finance Act, 2025, which replaced the earlier two-year period. Eligibility must be determined for the particular assessment year and taxpayer, rather than inferred merely because the portal displays a filing option.
The controlling provision for earlier assessment years is section 139(8A) of the Income-tax Act, 1961. The tax calculation follows section 140B, while the prescribed ITR-U form and corresponding original return form govern disclosure. The official Income Tax Department states that the facility can be used even where no original return was filed, subject to statutory conditions. A taxpayer should therefore first identify the relevant assessment year, next establish whether the proposed change is legally permissible, and only then calculate the additional payment.
Old Act and new Act: which year uses which law?
The Income-tax Act, 2025 took effect on 1 April 2026 for the new tax-year framework. Nevertheless, the Income Tax Department’s transition FAQs expressly state that the 1961 Act continues to govern AY 2026-27 and earlier assessment years. Consequently, an ITR-U filed in October 2026 for AY 2023-24 or AY 2025-26 remains an updated return under the old Act. The new Act separately contains updated-return provisions in section 263(6) and additional-tax rules in section 267 for tax years governed by it. Mixing section references from the two enactments in the same filing can lead to incorrect analysis and reporting.
Assessment-year calendar and additional tax in October 2026
The statutory clock runs from the end of the relevant assessment year, not from the date of filing the original return, receipt of a tax notice or discovery of an error. An assessment year is the year immediately following the financial year in which income was earned. The percentage is an additional income-tax charge on the relevant tax-and-interest base determined under section 140B; it is not a replacement for normal tax and it is not calculated on the entire undisclosed gross receipt without determining the correct taxable income. The table assumes filing during October 2026 and no taxpayer-specific disqualification.
| Financial year of income | Assessment year | Last day of 48-month period | Additional-tax band in October 2026 |
|---|---|---|---|
| 2021-22 | 2022-23 | 31 March 2027 | 70% (month 37–48) |
| 2022-23 | 2023-24 | 31 March 2028 | 60% (month 25–36) |
| 2023-24 | 2024-25 | 31 March 2029 | 50% (month 13–24) |
| 2024-25 | 2025-26 | 31 March 2030 | 25% (month 1–12) |
For AY 2022-23, the 48-month outer limit ends on 31 March 2027. A person who postpones a permissible correction beyond that date cannot assume a further ordinary ITR-U window. AY 2023-24 moves from the 60% to the 70% band after 31 March 2027; AY 2024-25 moves from 50% to 60%; and AY 2025-26 moves from 25% to 50%, if the statutory framework remains unchanged. The annual changes are a strong reason to calculate the liability with the actual intended submission date rather than reusing a worksheet prepared in an earlier year.
Four slabs are 25%, 50%, 60% and 70%
| Time after assessment year ends | Additional income-tax rate | Practical interpretation |
|---|---|---|
| Up to 12 months | 25% | First year after AY closes |
| After 12 and up to 24 months | 50% | Second year |
| After 24 and up to 36 months | 60% | Third year |
| After 36 and up to 48 months | 70% | Fourth and final year |
Eligibility: what can be corrected and what is barred
The central use case is disclosure of additional taxable income that was omitted or understated. Examples include interest missing from a return, an omitted taxable capital gain, a business receipt wrongly excluded, or a deduction that was claimed without meeting the conditions. The corrected return must recompute income and tax under the law applicable to that assessment year. A revised tax position that reduces total tax, produces a refund or increases an existing refund cannot ordinarily be filed as ITR-U. A return declaring a loss is generally excluded, although the Act provides a specific pathway where an earlier loss return is updated into a return of income or its loss is reduced in the permitted manner.
The restrictions are wider than a simple tax-payment test. The taxpayer must check whether a search under section 132, requisition under section 132A, specified survey, or action concerning seized records creates a bar for the relevant or linked years. An updated return is also restricted where assessment, reassessment, recomputation or revision proceedings are pending or completed for the relevant year, and where specified information has been received and communicated under legislation relating to money laundering, benami property, black money or foreign exchange offences. International information-exchange disclosures, notified categories and prosecution-related restrictions also require examination. A general statement that “anyone can file ITR-U within four years” is therefore inaccurate.
Special effect of section 148A show-cause notices
The Finance Act, 2025 introduced a further bar where a show-cause notice under section 148A is issued after 36 months from the end of the relevant assessment year. The statute also creates an exception if the authority subsequently makes an order under section 148A(3) holding that the case is not fit for issue of a section 148 notice. These provisions should be read alongside the separate prohibition arising from assessment or reassessment proceedings. Before using the filing utility, the tax professional should inspect the notice history, relevant dates, DINs, proceedings tab and any subsequent orders. A notice-free assumption based solely on an email inbox is not a sufficient legal check.
How additional tax is calculated under section 140B
Section 140B requires a complete reconciliation of normal income-tax, surcharge and cess where applicable, advance tax, tax deducted or collected at source, available credits, and interest or fee arising under the original-year provisions. The additional percentage is applied to the statutory tax-and-interest amount, not simply to the net cash remitted after arbitrary set-offs. If a return was already filed, the calculation also accounts for amounts previously paid and the difference created by the updated computation. Because the formula differs according to whether an original return exists and what was already assessed or paid, the official utility and section 140B should be used together, with independent review of the working.
Illustration: assume that, after all permissible credits and adjustments, the additional ordinary income-tax attributable to an omission is ₹1,00,000 and the applicable interest on that additional tax is ₹20,000. If the relevant additional-tax band is 70%, the illustrative additional levy is ₹84,000, being 70% of ₹1,20,000. The illustrative aggregate is therefore ₹2,04,000 before any separately applicable fee or other statutory adjustment. This is a teaching example, not a taxpayer-specific challan computation: actual liability depends on the original return, tax credits, dates, surcharge, cess, interest sections and any prior payment.
Why TDS credit and AIS reconciliation matter
The Annual Information Statement, Taxpayer Information Summary, Form 26AS, bank interest certificates, securities transaction reports, sale deeds and accounting ledgers are evidence sources rather than automatic legal conclusions. AIS may show gross amounts that require reconciliation to the taxable amount. For example, a property transaction value may not equal taxable capital gain, and securities sale proceeds are not themselves the net gain. Equally, TDS reflected in Form 26AS is a tax credit subject to the year and income rules; it is not proof that the underlying income was properly reported. A workpaper should map each information item to its tax head and explain whether an omission exists.
Filing workflow and controls for professionals
First download the original acknowledgement, computation, return schedules and challans. Prepare a side-by-side reconciliation of original versus proposed figures by head of income, deductions, losses and tax credits. Secondly, confirm the correct ITR form for the relevant year and the updated-return form applicable on the portal; the Department notified a revised ITR-U form through Notification No. 49/2025 and later an AY 2026-27 form through Notification No. 52/2026. Thirdly, inspect eligibility restrictions, including whether an ITR-U has already been filed for that assessment year. Fourthly, compute and pay the amount prescribed by section 140B, then submit and e-verify the updated return within the permitted time.
Where an update changes a carried-forward business loss, capital loss, unabsorbed depreciation, or minimum alternate tax or alternate minimum tax credit, the downstream impact cannot be ignored. Section 139(8A) contains rules requiring updated returns for affected subsequent years in specified circumstances. The team should prepare a year-by-year bridge showing the opening balance, utilisation and closing balance of each attribute. Failure to reconcile later-year returns may generate mismatches even where the first updated return is otherwise accurate. Audit-trail retention is particularly important for corporate taxpayers, firms and high-volume capital-gain cases.
Common errors and risk assessment
The most frequent mistakes are treating ITR-U as a refund claim, assuming the four-year period starts on the original filing date, omitting interest from the additional-tax base, failing to examine pending proceedings, and using section references from the new Act for an old assessment year. Another risk is making a selective disclosure that does not reconcile all taxable items in the year. Voluntary disclosure may correct a return but does not automatically extinguish penalties, prosecution exposure or other proceedings where separate law applies. The filing must be complete, truthful and supported by documentary evidence; a portal acknowledgement alone does not certify substantive acceptance by the tax authority.
Frequently Asked Questions
1. Can a person who never filed an original return use ITR-U?
Yes, subject to section 139(8A) eligibility and payment under section 140B. The absence of an original return is not by itself a bar, but an updated return cannot be used to claim a refund or bypass other statutory restrictions.
2. What is the last ITR-U date for AY 2022-23?
The ordinary 48-month window ends on 31 March 2027. Filing on 12 October 2026 falls in the 70% additional-tax band, provided the taxpayer is otherwise eligible.
3. Is 70% charged on the entire omitted gross income?
No. The percentage is an additional tax on the tax-and-interest base determined under section 140B. First compute taxable income, normal tax, interest and credits correctly; then apply the statutory additional-tax formula.
4. Can ITR-U be used to claim a larger refund?
No. An updated return that reduces total tax liability, increases a refund or results in a refund is generally not permitted. The appropriate remedy, if any, must be assessed under other statutory provisions.
5. Does the Income-tax Act, 2025 govern ITR-U for AY 2025-26?
No. The Income Tax Department confirms that the 1961 Act continues to govern AY 2026-27 and earlier assessment years, including later updated returns relating to those years.
6. Does receiving a section 148A notice always prevent ITR-U?
The precise date, statutory proviso, and any subsequent section 148A(3) order matter. A show-cause notice issued after 36 months can trigger a specific bar, subject to the stated exception; other proceedings restrictions may apply independently.
7. Is there a second opportunity to file ITR-U for the same assessment year?
Generally no. The updated-return facility is available only once for the same assessment year. Review all available records and the impact on subsequent years before submitting.
Key Takeaways
- As of 12 October 2026, AY 2022-23 through AY 2025-26 are within the four-year ITR-U framework, but eligibility is not automatic.
- The additional-tax band depends on the year and date: 70%, 60%, 50% or 25% for the four years listed above in October 2026.
- Section 139(8A) restricts refunds, loss returns and specified investigation or assessment cases; section 140B governs payment.
- Retain the eligibility checklist, comparative computation, challan, acknowledgement and subsequent-year carry-forward reconciliation.
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Disclaimer: This article is an educational analysis based on publicly available statutory material and official guidance checked for 12 October 2026. It is not legal, tax, investment or professional advice and does not establish that any particular taxpayer is eligible to file an updated return. The facts, assessment year, notices, proceedings, available tax credits, applicable interest, updated forms and later notifications must be independently verified before acting. Illustrations are simplified and should not be used as payment challans. Views and analysis are informational; TaxGuru accepts no responsibility for any loss, penalty, interest, filing error, missed deadline or other consequence arising from reliance on this publication.
