Income Tax Notices Explained: Section 143(1), 143(2) & 148

An income tax notice lands in your inbox and the first reaction is usually panic. In most cases it shouldn't be. The Income Tax Department issues several very different types of communication under different sections, ranging from a routine acknowledgment to a formal reopening of a closed assessment, and the correct response depends entirely on which one you have received. This guide walks through the three you are most likely to encounter: Section 143(1), Section 143(2), and Section 148.

Section 143(1): The Routine Intimation

Every return you file gets processed by the Centralized Processing Centre (CPC), and the output of that processing is a Section 143(1) intimation. It is largely automated: the system checks your return for arithmetical errors, incorrect claims apparent from the return itself, and mismatches against your Form 26AS, AIS, and TDS records. The intimation comes in one of three flavours: no change (your return is accepted as filed), a refund, or a demand where the computed tax differs from what you reported.

This is not a scrutiny notice and does not mean the department suspects anything. Read it carefully anyway. If it shows a demand you disagree with, most commonly from a TDS credit mismatch, you can file a rectification request under Section 154 rather than simply paying or ignoring it. If the intimation confirms your return with no adjustment, no action is needed.

Section 143(2): The Scrutiny Notice

A Section 143(2) notice means your return has been picked up for detailed scrutiny. This can happen because your case was selected under the risk-based Computer Assisted Scrutiny Selection (CASS) criteria, because of a specific mismatch or high-value transaction flagged by the system, or occasionally for manual reasons. Selection alone does not mean something is wrong; it means the assessing officer wants to verify specific claims, deductions, or income heads before the assessment is finalised.

Once this notice is issued, the case proceeds to assessment under Section 143(3). In practice today, most scrutiny is conducted through the Faceless Assessment Scheme, so you will not meet an officer in person; instead you respond through the income tax e-filing portal with documents and explanations against each query raised. Treat every query as an opportunity to close the point with clear, complete evidence the first time; incomplete or defensive responses tend to generate follow-up queries and prolong the case.

What to do when you receive one:

• Note the response deadline stated on the notice and calendar it immediately.
• Gather supporting documents for the specific issue flagged, not your entire financial history.
• Respond through the e-filing portal (or through your authorised representative) within the stated window; request an adjournment through the portal if you genuinely need more time, rather than simply missing the date.
• Keep a record of every submission and the acknowledgment generated.

Section 148: Reassessment After the Case Is Closed

A Section 148 notice is different in kind: it reopens a return that has already been assessed (or accepted without scrutiny) because the department believes income chargeable to tax has escaped assessment. This is a heavier action than routine scrutiny, and the law builds in more procedural safeguards before it can be issued.

Since the Finance Act 2021 reforms, a Section 148 notice cannot ordinarily be issued directly. The department must first issue a show-cause notice under Section 148A, share the information and material suggesting escapement, give you an opportunity to respond, and pass a reasoned order before deciding whether to proceed. Only after that step, and within the applicable time limits (which are shorter for smaller escaped-income amounts and longer where the escaped income crosses a specified threshold and certain conditions are met), can the formal Section 148 notice follow, leading to reassessment proceedings.

If you receive a Section 148A show-cause notice or a Section 148 notice, do not treat it as something to handle later. The information the department already holds (often from AIS, high-value transaction reporting, or third-party data) is the starting point, and a well-drafted response at the 148A stage can sometimes prevent the reassessment from proceeding at all. Once reassessment is underway, the burden is on you to explain why the flagged income is not taxable or was already disclosed.

Quick Reference: Which Notice Is Which

• Section 143(1): Automated intimation after processing. Routine. Action needed only if there is a demand or error.
• Section 143(2): Scrutiny notice. Your filed return is being examined in detail before assessment. Respond with evidence by the deadline.
• Section 148 (via 148A): Reassessment notice. A closed case is being reopened because income is believed to have escaped assessment. Respond at the show-cause stage if possible.

Whichever notice you have received, the deadline printed on it is not negotiable by default, but extensions can be requested through the portal in genuine cases. The earlier you involve a CA who can read the notice, identify exactly what is being asked, and prepare a complete first response, the less likely the matter is to escalate into a longer-running dispute. For businesses and NRIs alike, our tax advisory services include notice response and representation before the assessing officer.