ITR-U 2026: File Up to 4 Years of Missed Returns (48-Month Rule)

Last updated: July 2026. This guide has been rewritten for the 48-month ITR-U window introduced by the Finance Act 2025, effective 1 April 2025.

ITR-U in 2026: File Up to 4 Years of Missed Returns

The Updated Return (ITR-U), filed under Section 139(8A) of the Income Tax Act, lets you disclose missed income – or file a return you never filed at all – even after the original, belated, and revised return deadlines have passed. The Finance Act 2025 made ITR-U significantly more useful: for updated returns filed on or after 1 April 2025, the window is 48 months (4 years) from the end of the relevant assessment year, double the earlier 24-month limit.

The 48-Month Rule at a Glance

Until 31 March 2025, an updated return could be filed only within 24 months from the end of the relevant assessment year. The Finance Act 2025 amended Section 139(8A) to extend this to 48 months. In practical terms, as of July 2026 you can still file or correct returns for four assessment years – AY 2022-23 through AY 2025-26 – something that was impossible under the old rule.

Additional Tax: 25% to 70% Depending on When You File

ITR-U is a voluntary-compliance route, and it comes at a price. Over and above the normal tax and interest on the missed income, Section 140B levies an additional tax that increases the longer you wait:

For example, if the tax plus interest on your undisclosed income works out to Rs 10,000, the total payable is Rs 12,500 if you file within 12 months, Rs 15,000 within 24 months, Rs 16,000 within 36 months, and Rs 17,000 within 48 months. The 60% and 70% tiers are new – they were created by the Finance Act 2025 for the third and fourth years of the extended window.

AY-wise ITR-U Deadlines (as of July 2026)

Two things to note. First, the window for AY 2021-22 closed on 31 March 2026 – that year can no longer be updated. Second, the additional-tax tier depends on when you actually file, not just the assessment year: an ITR-U for AY 2024-25 costs 50% today but will cost 60% if you file on or after 1 April 2027. Filing earlier is always cheaper.

Who Can File ITR-U?

Any person can file an updated return – whether or not they filed the original return – in order to:

• Report income that was not disclosed in the original return
• Correct the head of income under which income was reported
• Reduce a loss or a carried-forward loss
• Reduce an unabsorbed depreciation claim
• Reduce a tax credit under Section 115JB/115JC
• File a return for a year where no return was filed at all

Note that for a given assessment year, ITR-U can be filed only after the belated/revised return deadline (31 December of the assessment year) has passed, and only once – an updated return cannot itself be updated.

Who Cannot File ITR-U?

You cannot file an updated return if:

• The updated return is a return of loss, shows a refund or increases an existing refund, or reduces your total tax liability
• A search has been initiated under Section 132, or books/assets have been requisitioned under Section 132A
• A survey has been conducted under Section 133A (other than TDS surveys)
• Assessment, reassessment, recomputation, or revision proceedings are pending or completed for that year
• A show-cause notice under Section 148A has been issued after 36 months from the end of the relevant assessment year – unless the Assessing Officer subsequently passes an order under Section 148A(3) holding that it is not a fit case for reopening (this restriction was added by the Finance Act 2025)
• Prosecution proceedings have been initiated for that assessment year
• The Assessing Officer has information about you under specified international agreements or specified laws

Step-by-Step Process to File ITR-U

Step 1: Calculate Additional Income and Tax

Identify the income that was missed or incorrectly reported. Calculate the tax on the additional income along with interest under Sections 234A, 234B, and 234C, and then the additional tax (25%/50%/60%/70%) under Section 140B based on when you are filing.

Step 2: Pay the Tax Before Filing

The entire amount – tax, interest, and additional tax – must be paid before the ITR-U is filed. Pay through e-Pay Tax (Challan 280) on the portal, selecting self-assessment tax as the minor head.

Step 3: Log in to the Income Tax Portal

Visit incometax.gov.in and log in with your PAN. Go to e-File > Income Tax Returns > File Income Tax Return.

Step 4: Select Updated Return

Choose the relevant assessment year and select Updated Return u/s 139(8A) as the filing type. Select the reason for updating from the dropdown menu.

Step 5: Fill the Return Form

Choose the applicable ITR form (ITR-1, ITR-2, etc.) and fill in all details including the additional income. The ITR-U schedule captures the original return details, the updated figures, and the computation of additional tax.

Step 6: Enter Challan Details

Enter the BSR code, challan serial number, date, and amount of tax paid in the tax-paid schedule.

Step 7: Submit and e-Verify

Verify all details, submit the return, and e-verify using Aadhaar OTP or another available method. Retain the acknowledgment for your records.

Practical Scenarios for Filing ITR-U

• Missed reporting FD interest – Interest from a fixed deposit was not included in your original return
• Forgot to report capital gains – Gains from sale of mutual funds or shares were never reported
• Wrong ITR form used – You filed ITR-1 but should have filed ITR-2 due to capital gains
• Never filed for an old year – With the 48-month window, salaried or small-business taxpayers who never filed for FY 2021-22 to FY 2024-25 can still become compliant

File ITR-U with FileWithUs.ai

Filing an updated return involves layered calculations – normal tax, interest under three sections, and the correct additional-tax tier. FileWithUs.ai auto-calculates the additional tax payable for your filing date, generates the correct ITR form, and guides you through payment and e-verification. Clean up past years before the window (and the cheaper tiers) close.