A notice is a process,
not a verdict.

Most notices are routine. The first job is identification: an intimation under section 143(1) adjusting your return, a defective-return notice under 139(9), a scrutiny notice under 143(2), an inquiry under 142(1), a reassessment notice under 148, usually preceded by a show-cause under 148A, or a demand under 156. Each has a different clock and a different correct response.

• Verify it is genuine: every notice must carry a Document Identification Number, and must appear in your e-filing account. If it is not on the portal, treat it with suspicion.
• Check the basics before anything else: your PAN, the assessment year, and the section quoted. Wrong-year panic is the most common panic.
• Diary the response date the moment it arrives. Extensions exist, but they are asked for, never assumed.

Scrutiny today is faceless: questionnaires arrive under 142(1) through the e-proceedings tab, and everything moves in writing. The reply is the case. It is drafted in your name, states facts in order, annexes evidence with an index, and answers exactly what is asked.

• Every claim gets a document; every document gets a number; every number is referred to in the reply.
• Need time? Seek adjournment on the portal before the deadline, not after. Silence reads as non-compliance.
• Non-compliance has its own cost: a best-judgment assessment under 144 and penalty exposure under 272A.

The proceeding ends in an order, with a computation and usually a demand notice under 156. Read the computation line by line before reacting: a surprising number of demands rest on an apparent mistake, a TDS credit missed, income counted twice, a figure transposed.

• Apparent mistakes are corrected through a rectification application under section 154, faster and cheaper than an appeal.
• Genuine disputes go to appeal. The two routes are not either-or; 154 for the arithmetic, appeal for the law.
• The demand clock runs regardless. If you are appealing, a stay application under 220(6) belongs in the same week, before recovery steps begin.

The first appeal is filed online in Form 35 before the Commissioner (Appeals) or the Joint Commissioner (Appeals). It is won or lost on drafting: a statement of facts that tells the story completely, and grounds of appeal that attack every addition independently, because anything not raised now is harder to raise later.

• The 30-day window runs from service of the order. Missed it? A condonation petition under 249(3) explaining each day of delay goes with the appeal.
• The appeal fee is paid by challan before filing, and the portal has strict formatting rules for facts and grounds; get them wrong and the filing bounces.
• New evidence that the officer never saw needs a separate application under Rule 46A; it does not walk in by itself.
• Penalty appeals, 270A and its cousins, are separate appeals with their own Form 35 each, usually heard with the quantum.

If the first appeal disappoints, the Income Tax Appellate Tribunal is the last fact-finding authority, after it, only questions of law travel to the High Court. Tribunal practice is a different craft: paper books, case-law compilations and oral argument.

• Filed in Form 36 within 60 days, with the department equally entitled to appeal your win.
• The Tribunal weighs documents heavily; the record built at the earlier stages is the record you argue from. This is why stage two matters so much.

Additions often bring penalty notices: under-reporting or misreporting under 270A, and procedural penalties for non-compliance. Penalties are defended separately, and the defences are real: reasonable cause, full disclosure, and the difference between a debatable claim and a false one.

• In the right cases, immunity under 270AA can close the penalty entirely, if the tax and interest are paid in time and no appeal is filed on the quantum. It is a strategic choice, made case by case, never by default.
• Each penalty order is independently appealable, on its own clock.