Income Tax Scrutiny Notice — Section 143(3) Guide 2026-27

Updated: 3 June 2026

Received a scrutiny notice? A notice under Section 143(2) / 143(3) means the Income Tax Department wants to verify specific items in your return. Do not ignore it. You must respond via the e-proceedings portal within the deadline. Non-response leads to a best-judgment assessment, which is almost always worse than engaging with the process.

DEADLINE

Section 143(2) notice must be issued within 6 months from the end of the financial year in which the ITR was filed. The final scrutiny assessment order under 143(3) must be completed within 12 months from the end of the Assessment Year. Know your deadlines — they protect you.

What Is a Scrutiny Assessment Under Section 143(3)?

A scrutiny assessment is a detailed examination of a taxpayer's return by an Assessing Officer (AO). The process has two stages:

Section 143(2) notice: The initial notice informing you that your return has been selected for scrutiny. Must be served within 6 months of the end of the FY in which you filed.
Section 142(1) notice: A more detailed notice from the AO listing specific queries, documents required, or accounts to be produced.
Section 143(3) order: The final assessment order passed by the AO after examining your responses — either accepting your return, making additions to income, or disallowing deductions.

Since Tax Year 2019-20, all scrutiny proceedings are conducted through the e-proceedings facility on the Income Tax e-filing portal (Faceless Assessment Scheme) — you generally do not need to appear in person before an AO.

Why Is a Return Selected for Scrutiny?

Selection Basis	Typical Triggers
CASS — Computer Assisted Scrutiny Selection	Large deduction claims, income drops, cash deposits vs declared income mismatch
AIS / 26AS mismatch	Interest income in AIS not declared in ITR; TDS credit mismatches
High-value transactions	Property purchase/sale above thresholds, large FD interest, share transactions
Foreign assets or income	Schedule FA (foreign assets) declared; DTAA claims; foreign remittances
CBDT mandatory criteria	Specific categories notified each year (e.g., charitable trusts, large businesses)
Information from third parties	SFT data from banks, registrars, SEBI; CIB intelligence

How to Respond to a Scrutiny Notice — Step by Step

Log in to the Income Tax e-filing portal (eportal.incometax.gov.in) → My Account → e-Proceedings. Check for all pending notices and their deadlines.
Read every query carefully. List the specific items the AO is questioning — income amounts, deduction amounts, or specific transactions. Do not respond generically.
Gather supporting documents for each query raised. Bank statements, investment proofs, Form 16, capital gains computation, property documents — organized query-by-query.
Prepare a written reply addressing each query point. Reference the relevant section of law, explain the factual position, and attach documentary evidence. Keep the tone factual and professional.
Upload response and documents through e-proceedings before the deadline shown in the notice. Download and save the acknowledgement receipt.
Attend virtual hearings if the AO schedules one via the portal. Respond to any further queries within given deadlines.
Review the draft assessment order if issued — you get an opportunity to object before the final order is passed under the faceless scheme.

NEVER IGNORE

If you do not respond to a scrutiny notice, the AO passes a best judgment assessment under Section 144 — treating your income as whatever the AO determines is reasonable, often resulting in large additions and penalties up to 200% of tax on concealed income. Always respond, even partially, before the deadline.

Types of Scrutiny Assessments

Type	Scope	Who Conducts
Limited Scrutiny	Only the specific item(s) flagged in the 143(2) notice — AO cannot expand scope without CBDT approval	Faceless Assessment Centre
Complete Scrutiny	Full examination of the return — all income heads, deductions, assets	Faceless Assessment Centre
Best Judgment Assessment (Sec 144)	AO's estimate when taxpayer does not respond or cooperate	Assessing Officer
Re-assessment (Sec 148)	Re-opening a closed assessment where income escaped assessment	Assessing Officer

Penalties If Scrutiny Results in Tax Demand

Nature of Addition	Penalty Provision	Penalty Rate
Under-reporting of income (genuine mistake)	Section 270A	50% of tax on under-reported income
Misreporting of income (intentional)	Section 270A	200% of tax on misreported income
Failure to maintain books of accounts	Section 271A	₹25,000
Interest on additional tax demand	Section 234B / 234C	1% per month
Concealment of income (pre-2016 cases)	Section 271(1)(c)	100% to 300% of tax evaded

How to Avoid Scrutiny Notices — Best Practices

Reconcile your ITR with your AIS (Annual Information Statement) and Form 26AS before filing — all interest, dividends, and property transactions appearing in AIS must be declared
Do not claim deductions without supporting documents (investment certificates, receipts)
Declare all bank account interest, even if below ₹10,000
Report all capital gains — even losses and gains on stocks/mutual funds
Maintain books of accounts if running a business or profession
File ITR before the due date — late filers have higher scrutiny probability in some CASS parameters
Disclose foreign assets and foreign income in Schedule FA accurately

Frequently Asked Questions

What is the difference between Section 143(1) and Section 143(3)?

Section 143(1) is an automated processing intimation — the income-tax system processes your ITR and sends a summary. It is not a scrutiny assessment; it simply confirms your return has been processed or flags basic mismatches (like TDS credit discrepancies). Section 143(3) is a full scrutiny assessment — it means an Assessing Officer (AO) has manually selected your return for detailed examination and has issued a notice asking you to explain specific items in your return, produce documents, and justify income, deductions, or exemptions claimed. A 143(3) assessment can result in additional tax demand, penalty, or confirmation of your return as filed.

Why was my income tax return selected for scrutiny?

Returns are selected for scrutiny either through CASS (Computer Assisted Scrutiny Selection) — an algorithmic system that flags returns with statistical anomalies, high deduction claims, large cash transactions, or mismatches with third-party data (AIS/26AS/TDS) — or through mandatory criteria set by the CBDT (e.g., returns with foreign assets, high-value property transactions, or specific deductions above thresholds). Receiving a scrutiny notice does not mean you have done something wrong; it means the system or AO wants verification of certain claims.

How do I respond to an income tax scrutiny notice under Section 143(2)?

First, you must respond to the Section 143(2) notice (the initial scrutiny selection notice) within the specified time — typically by acknowledging it on the income-tax portal (e-proceedings). Then, when the detailed questionnaire or Section 142(1) notice arrives, submit your response with supporting documents through the e-proceedings section of the Income Tax e-filing portal (eportal.incometax.gov.in). Organize documents by each query raised. Always respond before the deadline — non-response can lead to best judgment assessment (ex-parte) under Section 144, which is far more adverse.

What documents should I keep ready for income tax scrutiny?

Typical documents required in a scrutiny: (1) Bank statements for all accounts for the relevant Tax Year, (2) Salary slips and Form 16 from employer, (3) Investment proofs for all 80C/80D/other deductions claimed, (4) Property purchase/sale documents and capital gains computation, (5) Business/profession books of accounts and balance sheet, (6) Foreign income or asset details, (7) High-value transaction proofs (property, shares, FDs), (8) Form 26AS / AIS reconciliation, (9) Loan documents if interest deductions were claimed. Keep everything organized in chronological order.

Can I hire a CA to represent me in income tax scrutiny?

Yes — and it is highly recommended for complex cases. A Chartered Accountant (CA) or Tax Advocate can represent you before the Assessing Officer under a Power of Attorney. Your CA can respond to notices on your behalf, attend hearings, submit written arguments, and negotiate outcomes. For cases involving significant tax demands, disallowances of large deductions, or unexplained income additions, professional representation significantly improves outcomes. TaxClue can connect you with experienced income tax practitioners for scrutiny representation.

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