Defective Return Notice Under Section 139(9): What It Means and How to Fix It

A notice under section 139(9) means the Income Tax Department considers your return defective and is giving you a chance to fix it: you have fifteen days from the date of the intimation, or a longer period the Assessing Officer allows on your application. You answer it on the e-filing portal under e-Proceedings: choose Agree and upload a corrected return, or Disagree and explain why the return is not defective. If the defect is not fixed in time, the return is treated as invalid, as if it had never been filed.

Sources checked: 29 October 2026

Facts checked on 29 October 2026 against section 139 of the Income-tax Act 1961, section 263 of the Income-tax Act 2025 and rule 166 of the Income-tax Rules 2026 on incometaxindia.gov.in, and the e-Proceedings user manual and FAQs on the e-filing portal.

This is general information, not legal advice. The defect code and the dates in your own notice decide what you must do.

Key facts

Point	What applies	Where it comes from
What it is	Intimation that the return is defective, with an opportunity to rectify	Section 139(9), 1961 Act; section 263(7)(a), 2025 Act
Time to fix	15 days from the date of the intimation, or a further period allowed on application	Section 139(9); section 263(7)(a)
On the portal	"Defective Notice u/s 139(9)" under Pending Actions > e-Proceedings	e-Proceedings user manual
How to answer	Agree: upload the corrected return (JSON). Disagree: write the reason	e-Proceedings user manual, section 3.1
More time	Seek Adjournment on the portal; an application to the Assessing Officer	Portal FAQ 14; section 139(9)
If not fixed in time	Return treated as invalid, as if no return was furnished	Section 139(9); section 263(7)(b)
Fixed late, before assessment	The Assessing Officer may condone the delay and treat the return as valid	Proviso to section 139(9); section 263(7)(c)

What does a defective return notice mean?

Section 139(9) lets the Assessing Officer, where he "considers that the return of income furnished by the assessee is defective", tell you about the defect and give you an opportunity to rectify it. It is not an assessment and not a demand. It says the return, as filed, does not meet the conditions for a complete return.

The portal's FAQ describes a defective return as one with "incomplete or inconsistent information in the return or in the schedules or for any other reason". The notice is sent by email to your registered address and can be seen after logging in to the e-filing portal. It states the defect, usually with a short description of what is missing or does not match.

What makes a return defective?

The Explanation to section 139(9) says a return is defective unless all of these are met:

• the annexures, statements and columns for computing income under each head, gross total income and total income are filled in;
• the return carries a statement of the tax payable on the basis of the return;
• where a tax audit under section 44AB applies, the audit report has been furnished (with the return, or before it with proof);
• proof of tax deducted or collected at source, advance tax and self-assessment tax claimed is available;
• where books of account are kept, the trading and profit and loss account (or income and expenditure account) and balance sheet, and personal accounts of the proprietor or partners, are furnished; where accounts are audited, the audited accounts and auditor's report;
• where books are not kept, a statement of turnover or gross receipts, gross profit, expenses and net profit, and the debtors, creditors, stock and cash at the year end.

The Board can relax any of these for a class of taxpayers by notification. For tax years under the new Act, rule 166 of the Income-tax Rules 2026 gives a shorter list: a return is defective if applicable fields, schedules or columns are not filled in; if the audit report under section 63 was not furnished before the return in an audit case; if a return under section 263(6) does not carry the section 267 tax payment details; or if the brought-forward MAT or AMT credit claimed does not match the credit allowed in the latest return.

The portal's FAQ lists the errors it sees most often:

1. TDS credit claimed but the matching receipts or income not offered for tax.
2. Gross receipts in Form 26AS, on which TDS credit is claimed, higher than the receipts shown under all heads in the return.
3. Gross total income and every head shown as nil or zero, but tax computed and paid.
4. The name in the return not matching the PAN database.
5. Business or professional income shown without a balance sheet and profit and loss account.

How long do I have to fix it?

Fifteen days from the date of the intimation (section 139(9)), or any further period the Assessing Officer allows on an application. The portal's FAQ puts it as 15 days "from the date of receiving the notice or as the time duration specified in the notice". Count from the earlier date to be safe, and read the date in the notice itself.

If you need more time, for example because the corrected return needs figures from your accountant or a tax audit report still has to be filed, ask before the period ends. On the portal this is Seek Adjournment in the e-Proceedings screen. Keep the acknowledgement. Our notice deadline calculator counts the days from the date you enter.

How do I respond on the e-filing portal?

The e-Proceedings user manual sets out the steps:

1. Log in and open Pending Actions > e-Proceedings, then choose Self (an authorised representative logs in and chooses that role).
2. Against Defective Notice u/s 139(9), click View Notice to read or download it.
3. Click Submit Response and choose Agree or Disagree.
4. Agree: choose the mode of response, the ITR type, and upload the corrected return as a JSON file. The FAQ adds that the defect can also be corrected online in the ITR form.
5. Disagree: write why the return is not defective, attach what supports it, and submit.
6. Tick the declaration and submit. Note the transaction ID.

Two cautions from the FAQ: a response cannot be edited or withdrawn once submitted, and you do not need to e-verify the response. So prepare the corrected return fully before you upload it, and check that it fixes the defect named, not only the one you noticed. The defective return notice guide has the same steps on one page.

Should I agree, disagree or file a revised return?

• Agree when the notice is right: a schedule was left out, the balance sheet was missing, or a TDS credit was claimed without the income. The corrected return must address the exact defect.
• Disagree when the return was complete and the defect is a mismatch you can explain, for example income already offered under another head or a credit that belongs to a different year. Say so plainly and attach the working.
• Fresh or revised return: the FAQ says that while the time to file a return for that assessment year is still open, you may file a fresh or revised return instead of answering the notice. Once that time has passed, the 139(9) response is the only route.

If the defect is about TDS figures, compare the return with Form 26AS before you choose: two of the portal's common errors are mismatches with it.

What happens if I miss the deadline?

Section 139(9) is direct: if the defect is not rectified within the fifteen days or the extended period, "the return shall be treated as an invalid return and the provisions of this Act shall apply as if the assessee had failed to furnish the return". The portal's FAQ warns of the effects that can follow: penalty, interest, losses that cannot be carried forward and loss of exemptions.

There is one way back. Under the proviso, if you rectify the defect after the period but before the assessment is made, the Assessing Officer may condone the delay and treat the return as valid. That is a discretion, not a right, so act within the fifteen days wherever you can.

Is this the same under the Income-tax Act 2025?

Yes, in substance. Section 263(7) of the 2025 Act says a return is defective if it does not conform to the prescribed conditions (rule 166), keeps the fifteen days from the intimation or a further period on application, treats an unrectified return as invalid, and lets the Assessing Officer condone a late fix before the assessment. Which Act governs your notice depends on the year the return is for; our guide to the Income-tax Act 2025 for small businesses explains the switch.

How is this different from a 143(1) intimation?

A 139(9) notice comes before processing and asks you to complete or correct the return. An intimation under section 143(1) comes after processing and shows the tax computed, with any adjustment, refund or demand. If the Centralised Processing Centre wants to adjust your return, it first sends a proposed adjustment that you answer in the same e-Proceedings screen. Our guide to the 143(1) intimation and 143(2) scrutiny notice covers those, and the 143(1) intimation guide has the portal steps.

Getting help

Upload the notice to our notice decoder to see which notice it is and what it asks for, and check the form with which ITR form do I need before you prepare the corrected return. Our income-tax services team prepares corrected returns and responses to defect notices. To ask our expert team about your notice, book a consultation.