Got a Defective Return Notice u/s 139(9)? The 15-Day Window, Response Steps, and What Happens If You Ignore It

You filed your income-tax return on time, breathed a sigh of relief, and then an email from the Centralised Processing Centre (CPC), Bengaluru, landed in your inbox: your return has been treated as defective under Section 139(9) of the Income-tax Act, 1961. The clock now reads 15 days. Miss that window and the return you filed can be declared invalid, which legally means you never filed at all for that assessment year. This guide walks through exactly what the notice means, the statute behind it, and a step-by-step resolution on the e-filing portal.

A Section 139(9) notice is not a scrutiny notice and it is not an accusation of evasion. It is a correctable-error notice: the Department has found a mismatch or an omission in your ITR and is giving you a chance to fix it before processing. The most common triggers are unpaid self-assessment tax, a TDS credit claimed without the corresponding income being offered, or a gross-receipts figure in the profit-and-loss statement that does not tally with the tax computed.

The Scenario

Imagine Priya, a salaried professional in Pune earning Rs 14 lakh a year, who filed her ITR-1 for Assessment Year 2025-26 on 28 July 2025. On 12 August 2025 she receives an email titled "Communication u/s 139(9) for PAN ABCXX1234X for AY 2025-26". The notice carries an error code and a description: it says she claimed a TDS credit of Rs 41,000 in Schedule TDS but offered only Rs 9 lakh of salary income against a Form 26AS figure of Rs 14 lakh. The Department flags this as a defect because the income on which TDS was deducted has not been fully disclosed.

Priya has three practical questions, and they are the same three most taxpayers ask. First, how long does she actually have? Second, what happens to her return, her refund, and her ability to carry losses forward if she does nothing? Third, what is the mechanical sequence of clicks on the portal to make this go away? The answers all flow from the statute, so that is where we start. You can model the tax she should have paid on the full Rs 14 lakh using our income-tax calculator before responding, so the corrected figures match.

Statutory Answer

Section 139(9) of the Income-tax Act, 1961 states that where the Assessing Officer considers a return to be defective, the officer "may intimate the defect to the assessee and give him an opportunity to rectify the defect within a period of fifteen days from the date of such intimation or within such further period which, on an application made in this behalf, the Assessing Officer may, in his discretion, allow." The bare text is reproduced on indiacode.nic.in, the Government of India's official statute repository.

The same sub-section adds the consequence in plain language: "if the defect is not rectified within the said period of fifteen days or, as the case may be, the further period so allowed, then, notwithstanding anything contained in any other provision of this Act, 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." That single sentence is why the 15-day window matters so much: an invalid return is, in the eyes of the law, no return.

What counts as a "defect" is set out in the Explanation to Section 139(9). The recognised defects include a return not accompanied by the statutory computation of tax, annexures or columns left blank, the return filed without payment of self-assessment tax and interest due under Section 140A, books of account not enclosed where required, and an audit report not furnished where Section 44AB applies. The Income Tax Department's own FAQ on incometax.gov.in confirms that the notice is delivered by email and post and is also visible under "Pending Actions" on the e-filing portal.

Two procedural points are worth committing to memory. The 15 days run from the date of intimation, and an extension is possible only on a written application to the Assessing Officer before the original window closes; it is discretionary, not automatic. And under the portal's workflow, a response once submitted cannot be updated or withdrawn, so the corrected return must be right the first time.

Worked Resolution

Return to Priya. Her defect is the income-versus-TDS mismatch, so the fix is to file a corrected return offering the full Rs 14 lakh salary shown in Form 26AS and the Annual Information Statement (AIS), not the Rs 9 lakh she originally entered. Here is the sequence and the money involved.

Step 1 — Read the error code. Log in to the e-filing portal, open Pending Actions → e-Proceedings, and locate the notice u/s 139(9). The notice names the error code and the precise defect. Download the attached PDF; it specifies whether a full corrected return or only a partial correction is sought.

Step 2 — Recompute the tax. On the corrected income of Rs 14 lakh under the new regime for FY 2025-26, after the standard deduction of Rs 75,000, taxable income is Rs 13.25 lakh. Because her income exceeds Rs 12 lakh, the Section 87A rebate (which is Rs 60,000 in the new regime only where income is at or below Rs 12 lakh) does not apply. The table below shows the slab computation.

Step 3 — Reconcile TDS and pay the balance. Her employer deducted Rs 41,000 of TDS. Against a total liability of Rs 81,900, the shortfall is Rs 40,900, payable as self-assessment tax under Section 140A before the corrected return is submitted, plus interest under Section 234B and 234C where applicable. The portal's TDS calculator helps verify the credit figure against Form 26AS. Use the self-assessment tax challan (ITNS 280) and quote the AY correctly.

Step 4 — Submit the response. Choose "Yes" to "Do you agree with the defect?" if you accept it, upload the corrected return XML/JSON, and e-verify. If you disagree, you may respond "No" with an explanation, but be prepared to justify it. Remember the response is final once filed.

The cost of ignoring the notice is the comparison that focuses the mind. The table below contrasts the two paths.

If you choose old regime instead, compare the two using our old vs new regime calculator; the regime choice does not change the defect-correction process, only the final tax. Note that an invalid return also forecloses the chance to carry forward losses such as capital losses for set-off in future years, which for an investor can be far costlier than the late fee itself.

FAQ

How many days do I get to respond to a Section 139(9) notice?

Fifteen days from the date of intimation, per Section 139(9) of the Income-tax Act, 1961. You can apply to the Assessing Officer for a further period before the 15 days lapse, but the extension is discretionary. The notice and its deadline are visible under "Pending Actions" on the e-filing portal at incometax.gov.in.

What happens if I miss the 15-day deadline?

The return is treated as an invalid return, and the law applies as if you never filed for that assessment year. You would then have to file a belated return under Section 139(4) if the deadline still permits, attracting a late fee of up to Rs 5,000 under Section 234F (Rs 1,000 where total income is at or below Rs 5 lakh) and interest under Section 234A at 1% per month.

Can someone else respond to the notice on my behalf?

Yes. The e-filing portal lets you authorise another person, such as a chartered accountant or an Authorised Representative under Section 288, to respond to the 139(9) notice on your behalf. The authorisation is set up through the "Authorised Partners" or "My CA" function on the portal. The responsibility for accuracy still rests with you as the assessee.

Can I withdraw or edit my response after submitting it?

No. The Income Tax Department's portal workflow states that a response to a defective-return notice cannot be updated or withdrawn once submitted. This is why you should recompute the tax, pay any self-assessment shortfall, and reconcile Form 26AS and the AIS before clicking submit.

Will my refund be released while the defect is pending?

No. A defective return is not processed until the defect is cured, so any tax refund is held until you file a valid corrected return and it is processed by CPC. Responding promptly is the fastest route to releasing a stuck refund.

Is a 139(9) notice the same as a scrutiny or rectification notice?

No. A 139(9) notice flags a correctable defect before processing. A scrutiny notice under Section 143(2) examines a return already filed, and a rectification request under Section 154 corrects a mistake apparent from the record in an order already passed. If your concern is a post-processing error, see our guide on filing a Section 154 rectification request instead.

What are the most common defects that trigger the notice?

The frequent ones are self-assessment tax not paid before filing (Section 140A), TDS claimed in Schedule TDS without the matching income offered, gross receipts in the profit-and-loss account not reconciling with the computed tax, presumptive income declared below the Section 44AD/44ADA threshold without audit, and an audit report not furnished where Section 44AB applies. Each carries a distinct error code in the notice PDF.