Updated Return (ITR-U) Rules 2026: Who Can File, Additional Tax & Complete Procedure Under Section 263(6)

Every taxpayer makes mistakes-a missed rental income, an unreported capital gain, a forgotten bank interest, or simply not filing a return at all. Under the old regime, once the revised/belated return deadline passed, correction was nearly impossible without reassessment. The Updated Return (ITR-U), introduced in 2022 under Section 139(8A) of the old Act, changed this by allowing voluntary correction within a defined window.

Under the Income Tax Act, 2025, ITR-U is governed by Section 263(6). Budget 2025 extended the filing window from 24 months to 48 months. Budget 2026 further expanded the scope-ITR-U can now be filed even after reassessment proceedings have begun, with a 10% additional tax premium. Additionally, from 1 March 2026, ITR-U can be filed to reduce losses, addressing a long-standing limitation.

This guide covers who can file, who cannot, the additional tax structure, the expanded Budget 2026 provisions, and the step-by-step filing procedure. For professional help with income tax return filing (https://www.patronaccounting.com/income-tax-return), understanding ITR-U is essential for staying compliant.

Key Terms You Should Know

• Section 263(6): The ITR-U provision under IT Act, 2025. Allows filing an updated return within 48 months from the end of the relevant tax year, whether or not an original return was filed. Replaces Section 139(8A) of the 1961 Act.
• Additional Tax: A mandatory premium payable when filing ITR-U, calculated as a percentage of the aggregate of tax and interest payable. Rates escalate: 25% (within 12 months), 50% (within 24 months), 60% (within 36 months), 70% (within 48 months).
• Reassessment Notice: A notice issued under Section 247 (old Section 148) when the AO has reason to believe income has escaped assessment. Budget 2026 now allows ITR-U even after such a notice, with 10% additional premium.
• Revised Return: Under Section 263(5), a return filed to correct errors in an already-filed original or belated return. Window: 12 months from end of tax year (expanded by Budget 2026 from 9 months). Revised returns attract a fee of Rs 5,000 (income > Rs 5 lakh) or Rs 1,000 (income ≤ Rs 5 lakh) if filed after 9 months.
• Loss Reduction: Effective 1 March 2026, ITR-U can be filed to reduce carried-forward losses or unabsorbed depreciation. Previously, ITR-U could not be filed if the return was a loss return.
• Tax Year: Replaces the old “previous year” and “assessment year” concepts. Tax Year 2026-27 = 1 April 2026 to 31 March 2027.

Who Can File ITR-U?

Any person-individual, HUF, company, firm, LLP, AOP, BOI, trust, or any other entity-can file an Updated Return under Section 263(6) in the following situations:

• Did not file any return for the relevant tax year
• Filed the original return but missed reporting certain income
• Filed the original return but incorrectly reported income, deductions, or exemptions
• Filed a belated return but discovered errors after the revised return deadline
• Filed a revised return but subsequently discovered further omissions
• Received a reassessment notice and wants to voluntarily disclose (Budget 2026 expansion)
• Needs to reduce carried-forward losses or unabsorbed depreciation (effective 1 March 2026)

For entities using tax audit services (https://www.patronaccounting.com/tax-audit), ITR-U is particularly relevant when audit adjustments or post-audit discoveries reveal previously unreported income.

Who Cannot File ITR-U?

Section 263(6) restricts ITR-U filing in the following circumstances:

• The updated return results in a refund or increases an existing refund
• The updated return reduces total tax liability below what was declared in the original/revised/belated return
• A search under Section 247(1) (old Section 132) has been initiated against the taxpayer and the time for filing the return under the search provisions has not expired
• A survey under Section 247(3) (old Section 133A) has been conducted and books have been impounded
• Information has been received under PMLA, Black Money Act, Benami Transactions Act, or SFEMA and has been communicated to the taxpayer
• Information under a DTAA (Section 159 agreement) has been received and communicated to the taxpayer
• Prosecution proceedings have been initiated for the relevant tax year
• The updated return is a return of loss for the tax year (Section 263(6)(c)(i))-however, from 1 March 2026, loss reduction is permitted

Key distinction: ITR-U cannot create a loss return, but it can now reduce an existing loss. This is the Budget 2026 expansion-if you filed a loss return and need to reduce the loss amount (because some income was missed), you can now do so through ITR-U.

Additional Tax Structure for ITR-U

Important: The additional tax is calculated on the difference between the tax + interest payable on the updated income and the tax + interest already paid or credited in the original return. If tax was already paid on the originally declared income, only the incremental liability attracts the additional tax. All additional tax and interest must be paid before submitting the ITR-U.

What Budget 2026 Changed for ITR-U

Budget 2026 introduced three significant expansions to the ITR-U framework:

1. Filing after reassessment notice. Previously, ITR-U could not be filed once reassessment proceedings were initiated. Budget 2026 allows taxpayers to file ITR-U even after receiving a reassessment notice, with an additional 10% tax premium on top of the applicable slab rate. The rationale: reduce litigation by encouraging voluntary disclosure even after proceedings have begun. Once the taxpayer files ITR-U in response to a reassessment notice, the AO can only refer to the updated return-the reassessment cannot go beyond what is disclosed. Additionally, no penalty for under-reporting or misreporting will be imposed on income disclosed in the ITR-U filed after the notice.

2. Loss reduction. Effective 1 March 2026 (under the old Act for AY 2025-26) and continuing under the 2025 Act, ITR-U can now be filed to reduce carried-forward losses or unabsorbed depreciation. Previously, Section 263(6)(c)(i) restricted ITR-U where the return was a loss return. The restriction remains for creating a loss return through ITR-U, but reducing an existing loss is now permitted. If the loss reduction affects subsequent years, updated returns must be filed for those years as well.

3. No additional fee for filing. The CBDT FAQs for Budget 2026 confirm that there is no separate fee prescribed for filing ITR-U. The only financial cost is the additional tax (25%-70% or the reassessment premium).

How to File ITR-U: Step-by-Step Procedure

1. Identify the missed or incorrect income. Review AIS (Annual Information Statement), TIS (Taxpayer Information Summary), Form 26AS, bank statements, and investment records to identify the omission or error. Companies using professional accounting services (https://www.patronaccounting.com/accounting-services) should conduct a thorough reconciliation before proceeding.
2. Calculate the additional tax liability. Compute the revised total income, the tax and interest payable on the updated income, subtract the tax already paid or credited, and apply the applicable additional tax rate (25%/50%/60%/70% based on the filing window). If filing after a reassessment notice, add the 10% premium.
3. Pay the additional tax before filing. Use the e-filing portal or authorised bank to pay the additional tax through challan. The payment must be completed before submitting the ITR-U. Retain the challan receipt and BSR code.
4. Log in to the e-filing portal. Access the Income Tax e-filing portal at https://www.incometax.gov.in using your PAN and password.
5. Select the ITR-U form. Navigate to e-File > Income Tax Return > Updated Return. Select the relevant tax year and the applicable ITR form (ITR-1 to ITR-7). You can change the ITR form if the original form was incorrect.
6. Fill Part A of ITR-U. Enter: PAN, name, Aadhaar, tax year, whether a return was previously filed, the original acknowledgement number (if applicable), reason for updating (select from the prescribed list), and the ITR form number.
7. Fill Part B (the complete updated ITR). Complete the full ITR form with the updated income details, deductions, and tax computation. Enter the challan details for additional tax already paid.
8. Verify and submit. Verify using DSC (mandatory for audit cases and companies), EVC, or Aadhaar OTP. Submit the return. The acknowledgement (ITR-V) is generated upon successful submission.

ITR-U vs Revised Return vs Belated Return

Common Mistakes to Avoid

Mistake 1: Filing ITR-U to claim a refund. ITR-U is strictly for reporting additional income, correcting errors that increase tax liability, or reducing losses. It cannot be used to claim or increase a refund. If the updated computation shows a refund, the ITR-U will be rejected.

Mistake 2: Not paying additional tax before submission. The additional tax (25%-70%) must be paid through challan before the ITR-U is submitted. If tax is not paid, the return will not be accepted by the e-filing portal. For entities structured through company registration (https://www.patronaccounting.com/private-limited-company-registration), ensure the payment is from the correct PAN and entity.

Mistake 3: Filing ITR-U when search/survey proceedings are pending. If a search under Section 247(1) or a survey under Section 247(3) has been conducted and the related filing window is open, ITR-U is barred. Filing in this scenario will be invalid.

Mistake 4: Not filing updated returns for affected subsequent years. If the ITR-U reduces losses or depreciation carried forward, updated returns must also be filed for each subsequent year affected by the change. Failure to do so creates inconsistencies across multiple years.

Mistake 5: Missing the 48-month window. ITR-U can only be filed within 48 months from the end of the relevant tax year. After this window closes, voluntary correction is no longer possible, and the taxpayer is exposed to reassessment and penalty proceedings.

Key Takeaways

Section 263(6) of the Income Tax Act, 2025 provides a 48-month window for filing Updated Returns (ITR-U), allowing taxpayers to voluntarily correct errors, report missed income, and update their returns-even if no original return was filed. The additional tax escalates from 25% (within 12 months) to 70% (within 48 months), creating a strong incentive to file early.

Budget 2026 introduced three expansions: filing after reassessment notice (with 10% additional premium), loss reduction (effective 1 March 2026), and no separate filing fee for ITR-U. The reassessment expansion is particularly significant-it shifts the framework from enforcement-heavy to compliance-centric, allowing taxpayers to come clean voluntarily even after proceedings begin.

ITR-U cannot be used to claim refunds, reduce tax liability, or create loss returns. It can be filed only once per tax year. The full additional tax must be paid before submission. For taxpayers who discover missed income-whether through AIS reconciliation, post-audit findings, or DTAA information exchange-ITR-U provides a structured path to compliance without the adversarial consequences of reassessment.

Need Help Filing an Updated Return?

Filing ITR-U requires careful computation of the additional tax, accurate identification of the missed income, and proper challan payment before submission. Whether you missed filing entirely, discovered unreported income through AIS, or need to respond to a reassessment notice through voluntary disclosure, professional guidance ensures the ITR-U is filed correctly and the additional tax is minimised by filing as early as possible.

Explore our income tax compliance services (https://www.patronaccounting.com/income-tax-return) for expert assistance with ITR-U filing, AIS reconciliation, additional tax computation, and compliance under the new Act.

For queries, reach out at +91 945 945 6700 or WhatsApp us directly.