Got a Defective Return Notice u/s 139(9)? You Have 15 Days to Fix It on the e-Filing Portal

A defective return notice is not a tax demand and it is not a penalty order, but ignore it for 15 days and the return you laboured over can be wiped off the record as if you never filed. Under Section 139(9) of the Income-tax Act 1961, the Centralised Processing Centre (CPC) flags a return as defective, emails the notice to your registered address, and starts a 15-day clock the moment you receive it. This Q&A walks through exactly what a 139(9) notice means, the statutory consequences of letting it lapse, and a worked FY 2025-26 example so you can resolve it on the e-Filing portal without panic.

The Scenario

You filed your Income Tax Return for Assessment Year 2025-26 on time, the acknowledgement (ITR-V) downloaded fine, and you assumed your tax refund was on its way. Three weeks later an email lands titled "Communication of proposed adjustment u/s 139(9)" and the status on incometax.gov.in changes to "Defective". The notice says your return has a defect and you have 15 days to fix it.

The most common triggers, per the Income Tax Department's e-Filing FAQ on defective notices, are a gross mismatch between the income offered and the tax credit claimed, self-assessment tax that was never paid before filing, missing schedules in a business return, or a return form that does not match your income heads. The defect is not about how much tax you owe in absolute terms; it is about the return being incomplete or internally inconsistent. A salaried filer claiming a Rs 70,000 TDS credit while disclosing only part of the corresponding salary, for instance, is a textbook 139(9) case.

The critical date is the date of receipt of the notice, not the date you happen to open the email. From that day you have 15 days, or such further period as the Assessing Officer allows on a written request, to respond. Miss it, and the second-order consequences begin to stack up.

Statutory Answer

Section 139(9) of the Income-tax Act 1961 empowers the Assessing Officer to intimate a defect to the assessee and give an opportunity to rectify it within 15 days from the date of such intimation, with a power to extend that period on an application made by the taxpayer. The Explanation to the sub-section lists the conditions under which a return is regarded as defective, covering incomplete annexures, statements and columns, missing tax-audit reports where applicable, and returns not accompanied by proof of tax claimed as deducted or paid.

The sting is in the consequence. Where the defect is not rectified within 15 days (or the extended period), the proviso to Section 139(9) provides that the return "shall be treated as an invalid return", and the legal fiction is that the assessee is deemed to have furnished no return at all. That single line is why a 139(9) notice deserves more urgency than a routine intimation under Section 143(1). An invalid return is not a late return; it is a non-return.

The downstream statutory effects of an invalid return are significant and are summarised below.

Because the original return is erased, you also lose the benefit of carry-forward of losses you may have legitimately booked. For an investor who sold equity at a loss expecting to offset it against future capital gains taxed at 12.5%, that is a real and avoidable cost. The Income Tax Department's portal FAQ is explicit that once a defective return is treated as invalid, the taxpayer may face penalty, interest, non-carry-forward of losses, and the loss of certain exemptions.

There is a second route the statute leaves open: if the filing window for the Assessment Year is still alive, you may file a fresh or revised return under Section 139(5) instead of (or alongside) responding to the 139(9) notice. For AY 2025-26, the revised-return window runs until 31 December 2025 or completion of assessment, whichever is earlier. Choosing between "respond to the notice" and "file a revised return" depends on whether your original 15-day clock has already expired.

Worked Resolution

Consider Rohan, a salaried professional in Bengaluru, filing under the new regime for FY 2025-26. His employer paid him a gross salary of Rs 14,00,000 and deducted Rs 70,000 as TDS. Rohan filed ITR-1 but did not clear the self-assessment tax balance before submitting, so CPC issued a notice under Section 139(9). To resolve it correctly, he first has to recompute his true liability. You can replicate this with Oquilia's income tax calculator and confirm the regime choice using the old vs new regime comparison.

Applying the FY 2025-26 new-regime slabs and the Rs 75,000 standard deduction, his taxable income is Rs 13,25,000. Because that figure exceeds Rs 12,00,000, the enhanced Section 87A rebate of Rs 60,000 does not apply, so the full slab tax stands.

The defect, in Rohan's case, is that he filed claiming a Rs 70,000 credit against a Rs 81,900 liability without paying the Rs 11,900 difference. To cure it he pays the Rs 11,900 shortfall (plus any interest accruing at 1% per month under Sections 234B and 234C) through an online challan, notes the challan identification number, and then logs in to the e-Filing portal.

On the portal he opens "Pending Actions" then "e-Proceedings", selects the 139(9) notice, and chooses to respond by correcting the return. He re-enters the now-paid self-assessment tax challan details so the return ties out, and submits the corrected ITR within the 15-day window. One caution from the department's own FAQ: once the response to a defective-return notice is submitted online, it cannot be edited or withdrawn, so the figures must be right before clicking submit.

If Rohan had missed the 15-day deadline entirely and the original return had already been treated as invalid, his cleaner option for AY 2025-26 would have been to file a fresh return under Section 139(4) or 139(5) before 31 December 2025, paying any Section 234F late fee of up to Rs 5,000. Either way, the Rs 11,900 of tax does not disappear; only the procedural path to declaring it changes.

A final modelling tip: before you submit, reconcile the TDS in your return against Form 26AS using the TDS calculator. A large share of 139(9) defects are nothing more than a credit claimed in the ITR that the deductor never actually deposited, and that mismatch is fixable in minutes once you spot it.

FAQ

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

You get 15 days from the date you receive the notice. Section 139(9) also lets you apply to the Assessing Officer for a further period (an adjournment), and the department's e-Filing FAQ confirms an extension can be sought before the original window closes.

What happens if I ignore a defective return notice?

If you do not rectify the defect within 15 days or the extended time, the proviso to Section 139(9) treats your return as invalid, meaning you are deemed not to have filed at all. That can attract penalty and interest, block the carry-forward of losses under Section 139(3), and cost you exemptions tied to a valid return.

Can I edit my response after submitting it on the portal?

No. The Income Tax Department's FAQ on responding to a defective notice states clearly that once the online response is submitted, it cannot be edited or withdrawn. Verify the income, tax credit and challan figures before you confirm.

Is a 139(9) notice the same as a Section 148 reassessment notice?

No. A 139(9) notice is about curing a procedural defect in a return you already filed, with a 15-day window. A Section 148 reassessment notice reopens an assessment because income is alleged to have escaped assessment, and operates under entirely different 3-year and 10-year time limits introduced by the Finance Act 2021.

Will a defective return delay my refund?

Yes. While the return carries "Defective" status, processing under Section 143(1) is held, so any tax refund is paused until you submit a valid corrected return. Resolving the defect within 15 days is the fastest way to restart refund processing.

Can I file a revised return instead of responding to the notice?

Yes, if the Assessment Year's filing window is still open. For AY 2025-26 you may file a revised return under Section 139(5) up to 31 December 2025 or completion of assessment, whichever is earlier. This is often the cleaner route if the 15-day notice window has already lapsed.

Does paying the tax automatically resolve the defect?

No. Paying the Rs 11,900 shortfall (in the worked example above) is only half the job. You must also log in to the e-Filing portal, respond to the 139(9) notice, enter the challan details and submit the corrected return so the figures reconcile and the defect is formally cured.