ITR-U Updated Return: 48-Month Filing Window Explained

ITR-U Filing Window: 48 Months Extended

File ITR-U within 48 months from assessment year-end (March 31, 2031 for AY 2026-27). Additional tax: 25% within 12 months, 50% by 24 months, 70% by 48 months. Finance Act 2025 doubled from 24 months.

How to File an ITR-U Under Section 139 8A)

If you missed a deadline, forgot to report an income, or made a computational error in a past return, you now have a far longer runway to fix it. The Finance Act 2025 doubled the ITR-U filing window. What used to be a 24-month correction window is now a 48-month one.

Here is how the Updated Return under Section 139 8A) works, who can use it, and what it costs. If you need professional help filing, see our ITR and compliance services.

What Is an ITR-U?

ITR-U, short for Income Tax Return - Updated, is a corrective return filed under Section 139 8A) of the Income Tax Act 1961 (continued under the Income Tax Act 2025). It lets you voluntarily update or correct an earlier return, or file a return for an assessment year where you did not file at all.

It is not a revised return. A revised return (Section 139 5)) can be filed only before December 31 of the assessment year. Our belated, revised, and updated return guide explains how these three options differ. Once that window closes, ITR-U becomes the only way to correct or file.

The New 48-Month Window: What Changed

Before the Finance Act 2025, ITR-U could be filed within 24 months from the end of the relevant assessment year. The Finance Act 2025 amended the Section 139 8A) updated return provisions to extend this window to 48 months, effective April 1, 2025.

For AY 2026-27 (financial year 2025-26), this means:

The 48-month window also applies to prior assessment years that were still within the 24-month window on April 1, 2025. Practically, you can now file ITR-U for AY 2021-22 and later.

Who Can File ITR-U?

You can file an ITR-U if:

1. You did not file a return (original, belated, or revised) for the relevant assessment year.
2. You filed a return but understated your income.
3. You used a wrong head of income or wrong tax rate.
4. You need to reduce carry-forward of loss, unabsorbed depreciation, or MAT/AMT credit.
5. You want to correct any other error that resulted in under-payment of tax.

When You Cannot File ITR-U

ITR-U is a one-way correction mechanism. You cannot file it if any of the following apply:

• The update would result in a refund or increase an existing refund.
• The update would reduce your total income, total tax liability, or reduce loss claimed earlier.
• A search under Section 132, requisition under Section 132A, or survey under Section 133A (other than 133A 2A)) has been initiated against you for that year.
• Assessment, reassessment, revision, or re-computation is pending or completed for that year.
• The Assessing Officer has information under certain laws (Black Money Act, Benami Act, PMLA, Smugglers and Foreign Exchange Manipulators Act) that has been communicated to you.
• You have already filed an ITR-U for that assessment year. Only one ITR-U per AY is allowed.

Additional Tax: The Cost of Using ITR-U

This is where the new 48-month window costs more the longer you wait. The additional tax is computed on the aggregate of tax and interest payable under the updated return, after reducing what was already paid.

The 60% and 70% slabs were introduced by the Finance Act 2025 to make late use of ITR-U meaningfully costly.

Worked example: Arun did not file a return for AY 2024-27. In December 2028, he realises he should have reported Rs 6 lakh of freelance income. His tax liability on this income (after basic exemption and standard deduction) is Rs 62,400 plus interest of Rs 15,600. His aggregate is Rs 78,000.

• If he had filed between April 1, 2025 and March 31, 2026: 25% additional = Rs 19,500.
• If he files in December 2028 (falls in the 24 to 36 month slab): 60% additional = Rs 46,800.

Total ITR-U payment in the December 2028 scenario: Rs 78,000 + Rs 46,800 = Rs 1,24,800.

Waiting costs money. The sooner you file, the lower the additional tax.

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

Step 1: Compute the Correct Tax Liability

Re-work your income, deductions, and tax for the relevant assessment year. Identify the under-payment, the associated interest under Sections 234A, 234B, and 234C, and any late-filing fee under Section 234F.

Step 2: Determine the Additional Tax Slab

Check how many months have passed from the end of the relevant assessment year to the date you plan to file. Apply the 25%, 50%, 60%, or 70% slab from the table above.

Step 3: Pay the Tax Before Filing

Pay the aggregate of tax, interest, late fee, and additional tax via challan (ITNS 280 with minor head 300 for self-assessment or the applicable code for ITR-U as notified on the e-filing portal). Keep the challan details ready.

Step 4: Download and Fill ITR-U

The ITR-U form is available on the income tax e-filing portal. If you are unsure which base form applies, our ITR filing guide for AY 2026-27 walks through the forms and deadlines. You need to file the relevant ITR form (ITR 1 through ITR 7) with the ITR-U attached, reflecting:

• The original return details (if any).
• The reason for updating (from the 7 permitted reasons in Schedule Part B-ATI).
• The revised income, tax liability, and additional tax.

Step 5: File and Verify

File the return online. Verify it through Aadhaar OTP, net banking, DSC, or EVC within 30 days. An unverified ITR-U is treated as not filed.

Can You File Nil or Refund ITR-U?

No. If the updated computation leads to a refund or a lower tax liability, you cannot file ITR-U. The Act expressly bars such filings.

Practical implication: if you filed an original return on time and later realised you forgot a deduction that would increase your refund, your only remedy within the assessment year is a revised return (by December 31). After that, you cannot recover the extra tax paid.

Why File ITR-U?

Even though it costs 25% to 70% extra, ITR-U is still a better option than non-compliance in most situations:

1. Avoids prosecution: Wilful failure to file a return under Section 276CC can lead to prosecution. Voluntarily filing an ITR-U closes that risk.
2. Limits scrutiny: An updated return that discloses the missed income reduces the risk of a full reassessment under Section 148.
3. Interest keeps running: Every month you delay adds 1% interest under Section 234A and further penalties under Section 234B/234C. The meter does not stop just because you avoid filing.
4. Loan, visa, and tender documentation: A clean tax filing record is often required for home loans, visa applications, and government tenders. A gap year in your filings can block these.

Tax Garden Can Help

Filing an ITR-U is not just a matter of recomputation. A wrong disclosure, a missed reason code, or an incorrect challan mapping can render the return invalid, and you lose your one chance at correction for that AY. Tax Garden's tax compliance team files your ITR-U accurately, ensuring the correct additional tax slab based on your AIS and 26AS records. If you have more than one past AY to clean up, we sequence them so you pay the lowest legally possible additional tax.

Explore our plans or see how it works.

This guide covers ITR-U (Updated Return) filing under Section 139 8A) of the Income Tax Act 1961 and its continuation under the Income Tax Act 2025, as amended by the Finance Act 2025. The 48-month window, additional tax slabs 25%, 50%, 60%, 70%), restrictions on refund or loss claims, and one-ITR-U-per-AY rule have been verified against the CBDT circular on the Finance Act 2025 amendments at incometax.gov.in/iec/foportal/, the Finance Act 2025 text, and published analysis by ClearTax, Tax2win, and TaxBuddy. Confirm the current rules with your CA or tax advisor before filing.