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Case law › Section 143(1)

Section 143(1)

Authorities that bear on section 143(1) of the Income-tax Act, 1961. Each one tells you what it decided and what to do if it applies to you.

The Income-tax Act, 1961 was repealed on 1 April 2026. It still governs income earned up to 31 March 2026, and every proceeding about those years however late — assessment, reassessment, rectification, penalty, revision and appeal alike. Income earned from 1 April 2026 is governed by the Income-tax Act, 2025. What changed, and which Act governs your year →

What a section 143(1) notice is

Intimation. Computer-processed your return and found a difference. Most common notice by far. It is a low-severity notice in the processing family under the Income Tax Act 1961.

If you ignore it: Adjustment stands. Demand becomes payable and interest runs.

Time to reply: commonly stated as 30 days from the date of the notice — but the date printed on your own notice governs, and it overrides any general figure. This is a portal response window, not a statutory bar. Rectification u/s 154 remains available afterwards.

Under the Income Tax Act 2025: section 270(1). But read that as reference, not as the provision to cite. Under s.536(2) of the 2025 Act, a proceeding for any tax year beginning before 1 April 2026 stays under the Income Tax Act 1961 from the notice through to the appeal — so a notice arriving today for an earlier year is a 1961 Act matter, whatever today's date is.

Section 143(1) — the law in short

What the courts have decided on section 143(1), in one screen. Read this first; open an entry when you need the facts, the reasoning and the source.

Listed strongest first: Supreme Court, then High Court, then Tribunal, then CBDT. Nothing here has yet been read in full by a chartered accountant — open an entry to see where it came from.

Section 143(1) — 110 entries

Worked examples

Notice situations in which section 143(1) does the work, taken from the first line to the last. Each step carries the authority that licenses it.
A refund determined thirty-four months after the return, with interest under s.244A run from the wrong date and part of it taken against another year My refund came three years late, the interest under s.244A was computed from a date that appears nowhere in the section, and part of the money was set off against a demand under appeal - how do I get the rest? 8 steps · 27 authorities · s.244A, s.244A(1)(a), s.244A(1)(aa), s.244A(1A) A refund taken against two disputed demands - one stayed on payment of twenty per cent, the other with the stay application still undecided The processing centre has set my refund off against demands for two years that are both under appeal, and recovery of one of them is stayed - could it do that, and what do I do now that the money has gone? 8 steps · 31 authorities · s.245, s.220(6), s.156, s.244A A s.133(6) notice for six years of records about a supplier under investigation, with nothing pending and no approval on the face of it A s.133(6) notice has come asking for six years of records about a supplier who is under investigation, and no proceeding is pending against me. Must I answer it, how much of it, and can my own reply be used to reopen my years? 8 steps · 45 authorities · s.133(6), s.133, s.133C, s.135 An intimation that disallowed two claims before anyone had answered, a rectification nobody has decided, and next year's refund gone The processing centre disallowed my deductions and raised a demand without ever hearing me, my rectification has been sitting for seven months and my next refund has been taken against the demand - what do I do first? 8 steps · 25 authorities · s.143(1), s.143(1)(a), s.154, s.154(8) Form 10-IC filed 108 days after the due date, the 22 per cent rate refused in an intimation nobody appealed, and the condonation window closing in March My company ticked s.115BAA in the return but Form 10-IC went in late, the CPC has taxed it at the normal rate, the rectification has been refused and the appeal time is long gone - what is actually left? 7 steps · 23 authorities · s.115BAA, s.115BAA(2), s.115BAA(3), s.115BAA(5) Form 10AB for regular approval under s.10(23C)(vi) refused, the provisional approval cancelled, an exit tax of Rs 3,09,89,400 directed - and receipts that never crossed the sub-clause (iiiad) limit The Commissioner (Exemption) has refused our school society's regular approval under s.10(23C)(vi), cancelled the provisional approval and directed exit tax - what is left to us, and does the society even need the approval for these years? 8 steps · 39 authorities · s.10(23C), s.10(23C)(vi), s.10(23C)(iiiad), s.10(23C)(iiiab) Form 67 uploaded three days after the assessment year ended, and the whole foreign tax credit struck out in a s.143(1) intimation The processing centre has disallowed my entire foreign tax credit because Form 67 went in after the end of the assessment year - is Rule 128(9) mandatory, and what is the route now? 7 steps · 15 authorities · s.90, s.90(2), s.91, Rule 128 Four years of wage-revision arrears paid in one month, relief claimed in the return, and a s.143(1) intimation that took all of it back The processing unit has disallowed my client's s.89 relief because Form 10E was not on the portal when the return was processed - can the relief still be had, and was the employer wrong to deduct on the whole amount? 8 steps · 17 authorities · s.89, s.15, s.192, s.192(2A) Tax was deducted from your money and the portal says it was not The buyer deducted TDS on my property sale but it does not appear in my 26AS and CPC has raised a demand — how do I get the credit? 6 steps · 18 authorities · s.143(1), s.154, s.194-IA, s.201 The State audit finished in January, the return went in late, and the whole 80P deduction has gone on the date alone Our society filed after the due date because the statutory audit was not finished. Is the deduction really lost on that alone, and what happens to the penalties on our cash counter and the tax on our withdrawals? 8 steps · 25 authorities · s.80P, s.80P(2)(c), s.80P(4), s.80AC Three interests, a refund taken back, and an assessment order that says only that interest is to be charged as per law The assessment has charged me s.234A, s.234B and s.234C, withdrawn the refund I was paid at processing and charged interest on that too - what can I actually fight, and where do I take it? 8 steps · 32 authorities · s.234A, s.234B, s.234C, s.234D

Explained in this library

What section 143(1) does, in plain English, before you read what the courts made of it.

Can the Commissioner revise an intimation? The answer is not settled

My return was only processed under s.143(1) and never scrutinised. Can the Commissioner revise that under s.263?

How long the processing centre has, and what a late intimation is worth

Is there an outer date by which the intimation under s.143(1) has to be sent, and what happens if it goes out after that?

Rectification of a mistake apparent from the record

There is an obvious arithmetic or credit error in my order. Can it be fixed without an appeal?

section 43B: deductions allowed only on actual payment

I keep my books on the mercantile basis and I have provided for GST, provident fund, a bonus and interest on my bank loan. The assessing officer has added all of it back because I had not paid it by 31 March. Can he do that, and do I lose the deduction for good?

Set-off and withholding of refunds

The department has adjusted my refund against an old demand without telling me. Is that allowed?

The demand notice, and how long you actually have to pay

The order has come with a notice of demand. How long do I have, and can they give me less than thirty days?

What CPC may adjust in an intimation, and the notice it has to give first

CPC has changed my return and raised a demand under s.143(1)(a). What was it allowed to adjust, and did it have to warn me first?

Which Act governs your year: the 1961 Act after 1 April 2026

I am holding a notice and I do not know whether my year is under the Income-tax Act, 1961 or the Income-tax Act, 2025. Which Act applies to me, and is the old Act still of any use now that it has been repealed?

You did not appeal the intimation and an assessment has followed. Is the adjustment gone?

I did not appeal the s.143(1) intimation and a s.143(3) assessment has since been made. Can I still attack the processing adjustment?