What to do when you get a defective notice on your updated return under Section 139(8A)

The Scenario

You spotted a mistake in an already-filed return, filed an updated return (ITR-U) under Section 139(8A) to set it right, and then the Central Processing Centre e-mailed you a defective return notice. It feels contradictory: you filed the correction voluntarily, so why is the correction itself being called defective? This is a common situation for the taxpayer who reopens a past assessment year — a freelancer declaring Rs 4,00,000 of missed income, a salaried employee who forgot interest income, an investor adding an omitted capital gain.

A defective notice on an ITR-U is issued under Section 139(9) of the Income-tax Act, 1961, exactly as it would be for an original or belated return, but the response has one extra rule specific to updated returns. Per the Income Tax Department portal FAQ published at incometax.gov.in, you answer it through Login > Pending Actions > e-Proceedings > Submit Response, and in the section dropdown you must select 139(8A) so the system recognises it as an updated return rather than a fresh filing. Only one response may be submitted against one defective notice, so the single submission you make has to be complete and correct.

The most frequent trigger for a defect on an ITR-U, per the same portal guidance, is the additional income tax under Section 140B not being paid before filing. An updated return that shows tax due but carries no matching challan is treated as an incomplete return, and the system flags it as defective. Understanding that link between Section 140B and Section 139(9) is the whole game here, and this article walks you through the statute, a worked number, and the exact response.

Statutory Answer

Three sections of the Income-tax Act, 1961, interlock in this scenario, and it helps to see each doing its own job before you draft a response.

Section 139(8A) is the enabling provision. Introduced by the Finance Act 2022 and widened by the Finance Act 2025 (announced on 1 February 2025), it lets a taxpayer file an updated return within 48 months from the end of the relevant assessment year — up from the earlier 24-month window. It exists so genuine omissions can be corrected without a scrutiny proceeding, but it comes bundled with a cost, which is Section 140B.

Section 140B is the price of that second chance. It requires you to pay the tax and interest that would have been due plus an additional income tax calculated as a percentage of that aggregate, and — critically — it requires this payment before you file the ITR-U. The percentage climbs with delay, as set out in the table below (verify the exact ladder at indiacode.nic.in before quoting).

Section 139(9) is the enforcement mechanism. When the return the department receives is incomplete — here, because the Section 140B additional tax has not been paid, or the wrong ITR form was used, or income and TDS do not reconcile — the Assessing Officer or CPC serves a defective notice and gives you 15 days from the date of intimation to remedy the defect. If you do not respond within that window (or an extension the officer grants on your written request), the return is treated as though it was never filed, and for an ITR-U that means your voluntary correction lapses.

The chain is therefore simple to state: 139(8A) lets you file, 140B tells you what to pay first, and 139(9) is what catches you if the 140B payment (or any other completeness requirement) is missing. Your reply must close whichever gap the notice names.

Worked Resolution

Take Priya, a salaried professional who filed her original return for assessment year 2024-25 and later realised she had omitted Rs 4,00,000 of consultancy income. In September 2026 she files an ITR-U under Section 139(8A). Because this is within the 24-to-36-month band from the end of AY 2024-25, her Section 140B additional tax sits at the 60% rate in the table above. The point of the worked example is to show why a defect notice arrives and how the numbers close it.

First, the base tax on the additional income. Assume the omitted Rs 4,00,000 stacks on top of income already taxed at the 20% slab applicable between Rs 16,00,000 and Rs 20,00,000 under the FY 2025-26 new-regime slabs stored in Oquilia's rate configuration. The computation runs as follows.

If Priya files the ITR-U having paid only the Rs 83,200 base liability and forgets the Rs 49,920 additional tax, the CPC will not accept the return as complete. Within a few weeks it issues a defective notice under Section 139(9), and the underlying cause is the unpaid Section 140B amount. The fix is procedural, not adversarial: she pays the Rs 49,920 (plus interest) through a self-assessment challan, then submits her response.

Her step sequence is precise. She logs in at incometax.gov.in, opens Pending Actions > e-Proceedings, locates the defective-notice proceeding, and chooses Submit Response. In the section dropdown she selects 139(8A), not 139(1) or a generic option, because the updated-return classification must prevail. She attaches the corrected return reflecting the challan and files it inside the 15-day window. Because only one response is permitted against one notice, she checks the challan details and the ITR form type once more before submitting. You can sanity-check the base tax with the income tax calculator and compare regimes on the old vs new regime tool; if you are estimating the interest component, the advance tax calculator helps you see how shortfall interest builds up.

One nuance worth stressing: the 87A rebate does not rescue an ITR-U scenario like Priya's. Under the FY 2025-26 new regime the rebate reaches Rs 60,000 only when total income is at or below Rs 12,00,000, and Priya's income sits well above that after the added Rs 4,00,000. Readers can revise the mechanics of a refund or rebate through the Oquilia glossary entries on ITR, tax refund and self-assessment tax before they draft the response.

FAQ

What happens if I miss the 15-day deadline on a defective notice for my ITR-U?

Under Section 139(9), if you do not remedy the defect within 15 days of the intimation (or a longer period the Assessing Officer allows on your written request), the return is treated as invalid — as if it was never furnished. For an updated return that is especially costly, because the voluntary correction you attempted under Section 139(8A) simply lapses and any Section 140B payment made does not, by itself, count as a valid filing. Respond inside the window, or request an extension in writing before it closes.

Which section must I choose in the dropdown when responding?

Per the incometax.gov.in FAQ, when you respond to a defective notice raised against an updated return you must select 139(8A) in the section dropdown, not 139(1). The portal guidance states that where the updated-return option applies, it prevails over the other sections, because the classification determines how the correction is processed. Selecting the wrong section can cause the response to be treated as an ordinary return rather than an ITR-U.

Can I submit more than one response to the same defective notice?

No. The portal FAQ is explicit that only one response may be submitted against one defective notice. This is why the single submission must be complete: the corrected return, the Section 140B challan reference where additional tax was due, and the correct ITR form all need to be right on the first attempt. If you realise afterwards that something is still wrong, you would generally need to await the department's next communication rather than re-open the same notice.

Why did I get a defect notice when I filed the ITR-U voluntarily?

Voluntariness does not make a return complete. The most common cause, per the portal guidance, is the Section 140B additional tax — 25%, 50%, 60% or 70% of the aggregate tax and interest depending on when you file within the 48-month window — not being paid before the ITR-U was submitted. Other triggers are the same as for any return: a mismatched ITR form, income that does not reconcile with the 26AS or AIS, or missing tax-audit particulars. The notice tells you which defect applies.

Do I have to pay the Section 140B additional tax before filing, or can I pay later?

Section 140B requires the tax, interest and additional income tax to be paid before the updated return is furnished. An ITR-U filed without the additional tax is incomplete and is precisely what draws a defective notice under Section 139(9). Pay the self-assessment challan first, quote it in the return, then file — that ordering is what keeps the return valid.

How far back can I file an updated return now?

Following the Finance Act 2025, the window under Section 139(8A) is 48 months from the end of the relevant assessment year, extended from the earlier 24 months. The additional-tax rate rises the later you file, reaching 70% in the 36-to-48-month band. Check the exact eligibility and any restrictions (for instance, you cannot file an ITR-U that reduces your liability or increases a refund) at indiacode.nic.in.

Is a defect notice the same as a scrutiny notice under Section 143(2)?

No. A defective notice under Section 139(9) concerns the completeness of the return itself and is answered by fixing the defect within 15 days. A scrutiny notice under Section 143(2) opens a substantive examination of the return's contents and follows a different, longer process. If you later disagree with an assessment order that follows scrutiny, the route is an appeal to the Commissioner (Appeals) using Form 35 within 30 days, which is a separate remedy from the defect response covered here.