Last reviewed: 13 November 2026. A defective return notice under section 139(9) says your return, as filed, cannot be processed. It is a procedural notice, not an allegation, but it carries a hard consequence: if the defect is not cured within 15 days, the return is treated as never filed. For a business that means losing carry-forward of losses, facing late-filing fees and possibly a non-filing notice later.
Part of our income-tax notice series. For every notice type, the time limits and the appeal route, start with the complete guide to income-tax notices.
Common reasons for a defective return notice
| Defect | Typical case |
|---|---|
| Wrong ITR form | Business income or capital gains filed in ITR-1; company or LLP in the wrong form |
| TDS claimed but income not shown | Gross receipts with TDS under 194J or 194C reported as nil or lower than the receipts in Form 26AS |
| Tax payable but not paid | Return shows tax due without self-assessment tax paid |
| Books required but balance sheet or P&L not filled | Turnover above the presumptive limits with "No account case" selected |
| Tax audit applicable but report not filed | Return claims audit not applicable while turnover crosses the limit, or Form 3CD not uploaded |
| Gross receipts lower than in Form 26AS | Receipts with TDS netted off or booked under another head |
How to reply
- Open the notice on the portal and note the error code and description.
- Decide whether the defect is real. If it is, prepare a corrected return in the right form with the missing schedules or reports.
- If the department is wrong (for example, receipts were correctly shown under another head), choose the option to disagree and explain, with a reconciliation.
- Upload the corrected return as a response to the defective notice, not as a fresh or revised return.
- If 15 days is not enough (for instance, the audit report must be completed first), apply for extension on the portal before the time runs out.
Illustrative example
A consultant with professional receipts of ₹38,00,000 filed ITR-4 declaring presumptive income on ₹30,00,000, leaving out ₹8,00,000 received from a client late in the year. Form 26AS shows TDS on the full ₹38,00,000, so CPC issues a defective notice for receipts lower than the 26AS figure. The corrected ITR-4 shows the full receipts with income under section 44ADA and is uploaded within 15 days. The return is then processed as a valid return from the original date.
Why this matters for businesses
- An invalid return loses the benefit of carry-forward of business and capital losses.
- Late fee under section 234F and interest under section 234A can follow if a fresh return has to be filed.
- Where the return is invalid and income exceeds the threshold, a non-filing case can later be opened. See our page on high-value transaction and non-filing notices.
If the defect arose because the wrong figures were picked from AIS, also read our guide on 143(1)(a) mismatch notices.
Frequently asked questions
What is a defective return under section 139(9)?
A return that the department cannot process because of an error such as the wrong ITR form, TDS claimed without the related income, tax payable not paid, or a required balance sheet or audit report missing. You are given 15 days to correct it.
What is the time limit to reply to a 139(9) notice?
Fifteen days from the date of the notice. You can request an extension on the portal before the time expires, and the officer may allow it.
What happens if I do not respond to a defective return notice?
The return is treated as invalid, as if you had not filed it. That can mean loss of carry-forward of losses, late fee and interest, and a later non-filing case.
Should I file a revised return in reply to a 139(9) notice?
No. The corrected return must be uploaded as a response to the defective return notice itself, so that it relates back to the original filing date.
Can I disagree with a defective return notice?
Yes. If the return is not actually defective, choose the option to disagree on the portal and explain with a reconciliation, for example that receipts were reported under a different head.
We read the notice against your return, AIS and books, tell you what it is really asking, prepare the reply with supporting documents, file it on the portal and follow the matter through to the order and, where needed, appeal. The outcome rests with the tax authority; our work is to put a complete, documented response before it.
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This article is for general information and does not constitute advice on any specific case. Sources: the Income-tax Act, 1961 (which continues to govern assessment years up to 2026-27 under section 536 of the Income-tax Act, 2025), the Income-tax Act, 2025, the Finance Act, 2026 and the CBDT instructions and circulars cited in the text. Time limits run from the date of service of each notice or order; confirm the current position and the exact dates in your notice before acting. Firm details: Somesh Chandak & Associates, Chartered Accountants, Unit 119, 1st Floor, Centura Square IT Park, SG Barve Road, Wagle Estate, Thane West 400604. FRN 158694W.