Choose the return route by what you have already filed and what needs fixing: file a belated return if you missed the original deadline and have not filed for that assessment year; file a revised return to correct a return already filed; use an updated return (ITR-U) to disclose omitted income after the ordinary filing and revision windows, if you meet its conditions and pay the applicable additional tax. For AY 2026–27, the Income Tax Department says the belated-return deadline is 31 December 2026 or completion of assessment, whichever comes first. The dates and charges differ by assessment year, so check the current Department guidance for the year you are filing.
First identify the return route that fits your situation
In India, a missed deadline, an error in a filed return and income discovered after the normal filing windows are different problems. The Income-tax Act, 1961 provides separate routes for them: sections 139(4), 139(5) and 139(8A), respectively. Filing under the wrong route can leave the issue unresolved: for example, a revised return is for correcting a return already filed, while ITR-U is not a way to reduce tax or obtain a refund.
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| Route | When it fits | Timing | Key limitation |
|---|---|---|---|
| Belated return, section 139(4) | You missed the original due date and have not filed a return for that assessment year. | By the applicable statutory cutoff or before assessment is completed, whichever is earlier. For AY 2026–27, the Department FAQ gives 31 December 2026 or completion of assessment, whichever is earlier. | Late-filing consequences may apply; the amount depends on the year and taxpayer. |
| Revised return, section 139(5) | You have already filed a return under section 139(1) or 139(4), and need to correct an omission or wrong statement. | Before the applicable deadline or completion of assessment, whichever is earlier. The AY 2026–27 FAQ describes the relevant assessment-year end or assessment completion, whichever is earlier, while noting a proposed-law caveat. | It corrects a filed return; it is not the route when no original or belated return has been filed. |
| Updated return, ITR-U, section 139(8A) | You need to disclose additional income after the ordinary belated-return or revision opportunity. | Current Department guidance allows up to 48 months from the end of the relevant assessment year, effective 1 April 2025. | It generally cannot report a loss, reduce tax, create a refund or increase a refund. Statutory exclusions apply, it may be filed only once for an assessment year, and additional tax is payable. |
These routes depend on your assessment year (AY), filing history, whether assessment has been completed and the effect the correction would have on tax. An AY is the year in which income from the preceding financial year is assessed. Do not substitute a financial-year date for an assessment-year deadline.
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How to decide what to file
- No return has been filed: If the ordinary due date has passed, check whether the belated-return window for that AY remains open. If it does, section 139(4) is the route to examine.
- A return has been filed and contains an error: Check whether you can revise it under section 139(5). Confirm the applicable deadline and whether assessment has already been completed.
- You need to disclose additional income after those windows: Check whether ITR-U remains available for that AY and whether any statutory exclusion applies. Consider the additional tax as well as the underlying tax and interest.
- The ordinary routes are no longer available: If genuine hardship is involved, a separate request for condonation under section 119(2)(b) may be an option. Approval is required; it is not automatic.
A person who did not file an original return is not using the revised-return route, because there is no filed return to revise. ITR-U is a separate route for an eligible taxpayer to disclose additional income, subject to its exclusions and tax requirements; it should not be treated as a general substitute for a late original return.
A practical way to compare the options
Before selecting a section, answer these questions in order: Have you filed any return for this AY? Is the problem an omission or wrong statement in that return, or is it additional income that was not reported? Is the relevant window still open, and has assessment been completed? Would the change reduce tax or create or increase a refund? Are there exclusions, and what fee, interest or additional tax could apply? This sequence helps distinguish a correction from a later disclosure. The fact that one route’s filing window is longer does not make it suitable for every correction.
For example, if no return has been filed, the first deadline to check is the belated-return deadline for that particular AY. If a return has already been filed and you find a wrong statement while revision remains open, check section 139(5). If the ordinary opportunities have passed and you need to disclose additional income, check ITR-U eligibility and its extra tax. These examples describe the decision path, not a determination that any particular taxpayer qualifies.
Belated returns: filing after the original due date
Who should consider a belated return
A belated return under section 139(4) is for a taxpayer who missed the original filing deadline and has not yet filed a return for the relevant AY. It may still be filed only within the applicable belated-return period and before assessment is completed, if that occurs first. The Department’s rules and dates are year-specific, so confirm the deadline for the exact AY rather than relying on a date published for another year.
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The Income Tax Department’s AY 2026–27 FAQ states that a belated return may be furnished by 31 December 2026 or before completion of assessment, whichever is earlier. The same FAQ states a late filing fee of ₹1,000 when total income does not exceed ₹5,00,000 and ₹5,000 in other cases. These are AY 2026–27-specific figures; they should not be applied automatically to another assessment year. Your individual amount and other consequences depend on your circumstances and the applicable rules.
Keep the original due date and belated-return cutoff separate in your planning: the former is the regular filing deadline, while the latter is the later statutory opportunity to file after missing that deadline. The later date is not an extension of the original deadline and does not remove late-filing consequences. Assessment completion can also make the available period shorter than the calendar date.
What to do before filing
- Confirm the assessment year and check that the belated window is still open and assessment has not been completed.
- Gather the income, deduction and tax-payment information needed to prepare the return. Reconcile it against relevant records, including Form 26AS and the Annual Information Statement (AIS), where applicable.
- Use the return form and filing instructions that apply to that AY, then complete the portal’s filing and verification requirements. Do not assume that a return is complete merely because it has been prepared or uploaded; follow the current official process through verification.
- Check the late-filing fee and any other tax or interest due for your case before submitting. The AY 2026–27 FAQ’s fee bands are not a complete calculation of an individual’s liability.
The Department material cited here gives detailed portal instructions for a return filed after an approved condonation request, not a step-by-step interface walkthrough for every belated filing. Portal labels and filing instructions can change; follow the current instructions for the return type and AY you select.
Revised returns: correcting a return already filed
When revision is the right route
Section 139(5) applies when you have already filed a return under section 139(1) or a belated return under section 139(4), and you discover an omission or wrong statement that needs correction. It is not a way to file the first return for an AY. Check the applicable revision deadline and whether assessment has been completed before preparing a revised return.
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The Department FAQ describes the AY 2026–27 revision window as ending by the relevant AY end or completion of assessment, whichever is earlier, and notes a proposed-law caveat about the AY-end date. Because this is transition-period guidance, confirm the latest official instructions for the specific AY before acting. Do not assume that the date for a belated return automatically governs a revised return.
Before revising, identify the exact figures or statements that were wrong or omitted and reconcile the corrected information with your supporting records. A revision corrects the filed return; it does not eliminate any separate tax, interest or other consequence that follows from the corrected figures.
Updated returns (ITR-U): disclosing additional income later
Window and use
Section 139(8A) provides the updated-return route for an eligible taxpayer to disclose additional income after the regular belated and revision opportunities. The Income Tax Department describes a filing window of up to 48 months from the end of the relevant assessment year, effective 1 April 2025. The 48-month period is measured from the end of the AY, not from the date you discover the omission or from the original due date.
ITR-U may be relevant when omitted income needs to be brought into the return and the regular filing windows have passed. It is not a correction mechanism for every kind of mistake: the Department says an updated return generally cannot report a loss, reduce tax, create a refund or increase a refund. It may be filed only once for an AY, and statutory exclusions can make a taxpayer or case ineligible. Check the current section 139 rules and official instructions against your circumstances before relying on this route.
Additional tax increases with time
The Department’s current explainer sets out these additional-tax rates by the period elapsed from the end of the relevant AY:
| When ITR-U is filed | Additional tax rate described by the Department |
|---|---|
| Within 12 months | 25% |
| More than 12 months and within 24 months | 50% |
| More than 24 months and within 36 months | 60% |
| More than 36 months and within 48 months | 70% |
These percentages are additional tax, not the entire amount due. Applicable tax and interest also matter. The time band is measured from the end of the AY, and the applicable amount depends on the facts and rules for the filing. Calculate the liability using current official instructions rather than treating the percentage as a standalone charge.
Check eligibility before preparing an updated return
- Confirm that the 48-month window has not expired for the relevant AY.
- Check whether your intended change is to disclose additional income, rather than to claim a loss, reduce tax or create or increase a refund.
- Check the statutory exclusions under section 139(8A); eligibility is not established by the length of the filing window alone.
- Confirm that an updated return has not already been filed for that AY.
- Work out the underlying tax and interest as well as the additional-tax rate for the applicable period.
The Department’s guidance makes clear that an updated return has a longer filing window than the ordinary routes, but that time does not remove its restrictions. If your proposed correction would lower your tax bill or produce a refund, ITR-U is generally not the mechanism to achieve it.
The Department’s manual also states the practical limit plainly: “In case of filing ITR-U the taxpayer cannot file return beyond four years from the end of relevant assessment year and also has to pay i.e. 25%/ 50%/ 60%/70% additional tax as per section 139(8A).” Treat the four-year window and the additional-tax bands as two parts of the same decision: filing before expiry does not mean the additional tax is waived.
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Condonation is distinct from filing a belated, revised or updated return within its ordinary window. Under section 119(2)(b), a taxpayer facing genuine hardship may request that the delay be condoned. The request must be approved; hardship alone does not guarantee approval, and the filing route should not be assumed available until the required approval is obtained.
Department-documented filing process after approval
The Income Tax Department’s “Filing of ITR after Condonation of Delay – User Manual” describes the post-approval process under section 139(9A). Its instructions apply to filing after an approved condonation request, not to every ordinary return. The manual lists these prerequisites:
- A valid e-filing user ID and password.
- The unique number of the Principal Commissioner of Income Tax (PCIT) condonation order.
- Bank details.
- Form 26AS and AIS.
After approval, the manual’s documented sequence is:
- Select the relevant assessment year and section 139(9A) for the post-condonation filing.
- Choose the applicable ITR type and prepare the return using the relevant offline utility.
- Generate the return JSON and upload it through the specified filing route.
- File the return and complete verification.
The manual says the section 139(9A) post-condonation option uses the offline utility and that online filing is unavailable for this route. Follow the current Department manual and the terms of the approval order, because this specialized process should not be confused with ordinary online belated filing or ITR-U.
Which law applies to AY 2026–27 and earlier?
The Income-tax Act, 2025 affects tax years beginning from 1 April 2026. The Department’s transition FAQ says the Income-tax Act, 1961 continues to govern filing matters relating to AY 2026–27 and earlier. It also says an updated return for AY 2026–27 may be filed within the period prescribed under the old Act. This transition point is time-sensitive: verify the latest Department guidance for the AY involved rather than applying the new Act to an earlier assessment year by assumption.
Records and checks that help prevent a second correction
Before preparing a belated, revised or updated return, assemble the information for the relevant AY and compare the figures you plan to report with the records available to you. The Department manual specifically lists Form 26AS and AIS as prerequisites for its post-condonation filing process; these are also useful records to reconcile when preparing tax information. Keep in view that a record mismatch may need investigation rather than a simple change to a return figure.
- Confirm the AY, the return already filed (if any), and the filing section available for the situation.
- Check the deadline against assessment status; completion of assessment can be an earlier cutoff for the routes described above.
- Identify whether the proposed correction discloses additional income or instead changes tax downward or affects a refund.
- Review any fee, tax, interest or additional tax that may apply before submitting.
- Complete the verification step required by the filing route and retain the relevant filing and approval records.
The available general guidance does not determine an individual taxpayer’s fee, interest, assessment status or eligibility for an exclusion or condonation. Those depend on case-specific facts and the latest rules for the relevant AY.
Frequently Asked Questions
How do I file a belated income tax return?
First confirm the assessment year and that the belated-return window is still open and assessment has not been completed. For AY 2026–27, the Income Tax Department FAQ gives 31 December 2026 or assessment completion, whichever is earlier. Use the applicable return form and current portal instructions, reconcile your figures with relevant records such as Form 26AS and AIS, account for any fee, tax or interest, and complete the required verification. The fee and deadline should not be generalized to other AYs.
Can I revise my ITR after filing?
A revised return under section 139(5) may be available if you have filed a return under section 139(1) or a belated return under section 139(4) and need to correct an omission or wrong statement. Check the deadline for that AY and whether assessment has been completed. For AY 2026–27, the Department FAQ describes the relevant AY end or assessment completion, whichever is earlier, and notes a proposed-law caveat.
Can I file ITR-U if I did not file an original return?
ITR-U is a separate route for an eligible taxpayer to disclose additional income, subject to statutory exclusions and additional tax. The guidance summarized here does not establish eligibility for every person who did not file an original return, so do not assume it is a general substitute for a belated original return. Check the current section 139(8A) rules and instructions for your facts.
Can I update my return to claim a refund or reduce tax?
Generally, no. The Department says an updated return cannot be used to report a loss, reduce tax, create a refund or increase a refund. ITR-U is intended for eligible additional-income disclosure, and other statutory exclusions may also apply.
What is the last date to file ITR-U, and how much additional tax applies?
Current Department guidance describes a window of up to 48 months from the end of the relevant assessment year, effective 1 April 2025. The additional-tax rates described are 25% within 12 months, 50% within 24 months, 60% within 36 months and 70% within 48 months from the end of that AY. Applicable tax and interest also matter, and an updated return may be filed only once for an AY. Verify current guidance and eligibility before filing.
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If genuine hardship is involved, you may consider a separate condonation request under section 119(2)(b). Approval is required and is not guaranteed. The Department manual describes a section 139(9A) filing process only after an approved condonation request, with specific prerequisites and an offline-utility route.
The Bottom Line
Bottom line: Match the route to your filing history and the change you need: section 139(4) for an eligible late first return, section 139(5) to correct a filed return, and section 139(8A) to disclose eligible additional income after ordinary windows. Check the relevant AY deadline, assessment status, restrictions and amounts due before filing. For AY 2026–27 and other transition-period matters, rely on the latest official Department instructions; a longer ITR-U window does not make it a refund or tax-reduction route.
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