Received defective return u/s 139(9)? Here’s how to fix and re-file (AY 2026-27)

A notice under Section 139(9) means your income tax return contains a defect that must be corrected. It is issued when the return is incomplete, inconsistent, or filed using the wrong ITR form.

The notice states the defect and the time available to correct it, usually 15 days from the date of issue. If you correct the defect within that period, your return remains valid from its original filing date. If you do not respond within the time allowed, the return is treated as invalid.

In this article we explain why you receive a notice under Section 139(9), how to correct the defect on the income tax portal, what happens if you miss the deadline, and when you can disagree with the notice.

Key takeaways

• A notice under Section 139(9) means your return has a defect that must be corrected.
• The response deadline is usually 15 days from the date of the notice. Follow the date stated in your notice.
• Correcting the defect within the deadline keeps your return valid from its original filing date.
• If you do not respond within the time allowed, the return is treated as invalid.
• You can respond through Pending Actions → e-Proceedings on the income tax portal by correcting the defect or, if you disagree, by submitting your explanation with supporting documents.

What a defective return notice means

A notice under Section 139(9) is issued when the Central Processing Centre finds that your return is incomplete, inconsistent, or contains a defect. The notice identifies the defect and states the time available to correct it.

If you correct the defect within the time allowed, your return remains valid from its original filing date. If you do not respond within the deadline, the return is treated as invalid.

Common reasons for a defective return

Most Section 139(9) notices arise because the return is incomplete or does not match the department’s records. Common reasons include:

• TDS claimed without reporting the corresponding income. You claimed TDS credit but did not report the income on which the TDS was deducted.
• Income mismatch with AIS or Form 26AS. The income reported in your return is lower than the income reflected in your AIS or Form 26AS.
• Wrong ITR form. For example, filing ITR-1 despite having capital gains that require ITR-2 or ITR-3.
• Missing schedules. Examples include Schedule CG for capital gains, Schedule HP for house property income or loss, or the Balance Sheet and Profit & Loss schedules in ITR-3.
• Tax mismatch. The tax payable in your return does not match the challans or TDS credits claimed.
• Other filing defects. An inoperative PAN, an unverified return, or a missing audit report where one is required.

The response deadline

The notice states the deadline for correcting the defect. In most cases, it is 15 days from the date the notice is served. Check the deadline shown in your notice and respond before it expires.

If you need more time, you can request an extension through Pending Actions → e-Proceedings on the income tax portal. State the reason for the request and submit it before the deadline. An extension is granted at the Assessing Officer’s discretion.

If you correct the defect

If you correct the defect within the time stated in the notice, your return remains valid from its original filing date. Processing continues after the corrected return is accepted.

If you do not respond

If you do not correct the defect or obtain an extension within the time allowed, your return is treated as invalid.

That can result in:

• A late filing fee under Section 234F, if applicable.
• Interest under Sections 234A, 234B, and 234C on unpaid tax.
• Loss of the carry-forward of eligible business and capital losses.
• Delay or denial of any refund.
• Further proceedings for failure to file a valid return.

How to respond

1. Log in to the income tax portal and open Pending Actions → e-Proceedings.
2. Open the Section 139(9) notice and note the assessment year, acknowledgement number, response deadline, and the defect identified.
3. Review the defect and compare your return with your AIS, Form 26AS, and supporting records, where relevant.
4. Select Agree if you accept the defect or Disagree if you believe the return is not defective.
5. If you agree, prepare the corrected return by selecting In response to notice under Section 139(9) and enter the acknowledgement number and filing date of the original return.
6. Pay any additional self-assessment tax before filing, if the correction increases your tax liability.
7. Submit the corrected return and e-verify it within the prescribed time.
8. Save the acknowledgement after submission.

A submitted response cannot be withdrawn through the portal.

Corrected return or revised return

You can respond to the Section 139(9) notice by filing a corrected return. If the time limit for filing a revised return under Section 139(5) is still available, you may also file a revised return. If a Section 139(9) notice is pending, respond to that notice before filing the revised return.

After you respond

Once the corrected return is accepted, the return proceeds for processing. If a refund was pending because of the defect, it is processed after the return is accepted and processed under Section 143(1).

If the deadline has passed

If your return has already been treated as invalid, your options depend on the applicable time limits.

• File a belated return, if the statutory deadline has not expired.
• File an updated return (ITR-U) under Section 139(8A), if you are eligible.
• File an appeal under Section 246A if you dispute the order treating the return as invalid.

Common mistakes

• Ignoring the notice without checking it on the income tax portal.
• Missing the response deadline.
• Submitting an explanation without correcting the defect where a correction is required.
• Changing parts of the return unrelated to the defect identified in the notice.
• Failing to e-verify the corrected return after filing.

Frequently asked questions

What is a defective return notice under Section 139(9)?
A notice under Section 139(9) says your income tax return contains a defect that must be corrected. The notice identifies the defect and specifies the response deadline. If you correct it within that period, your return remains valid from the original filing date.

Is a Section 139(9) notice a penalty?
No. The notice itself does not impose a penalty. If you do not respond within the time allowed, your return may be treated as invalid, which can lead to late-filing consequences.

How do I respond to a Section 139(9) notice?
Log in to the income tax portal, open Pending Actions → e-Proceedings, review the notice, and choose either Agree or Disagree. If you agree, correct the defect, submit the return in response to the notice, and e-verify it before the deadline. If you disagree, submit your explanation with supporting documents.

How long do I have to respond to a Section 139(9) notice?
The response period is generally 15 days from the date of the notice. Check the deadline stated in your notice. You can request more time before the deadline, but approval is at the Assessing Officer’s discretion.

What happens if I do not respond to a Section 139(9) notice?
Your return may be treated as invalid. That can result in a late-filing fee, interest on unpaid tax, loss of the ability to carry forward eligible losses, and delays to any refund.

Can I file a revised return instead of responding to the notice?
You can file a revised return if you are within the permitted time limit. Respond to the Section 139(9) notice first so the pending action on the portal is addressed before filing the revised return.

Sources and references

• Income Tax Department, e-filing portal and e-Proceedings — incometax.gov.in
• Income Tax Act, 1961 — Section 139(9), and Sections 234F, 234A, 246A
• CPC guidance on responding to defective return notices