All Types of Income Tax Notices in India: Complete List for FY 2025-26

As a Chartered Accountant in India, understanding the full landscape of income tax notices is essential. Each notice type carries different implications, deadlines, and response strategies. This comprehensive reference covers every notice you're likely to encounter, organized by purpose and severity.

Overview: Notice Categories

Income tax notices broadly fall into four categories:

1. Processing & Verification — automated notices from CPC
2. Inquiry & Assessment — seeking information or initiating assessment
3. Reassessment & Reopening — reopening completed assessments
4. Rectification & Appeal — correcting past orders

Processing & Verification Notices

Section 139(9) — Defective Return Notice

What it is: CPC identifies your return as defective due to missing information, inconsistencies, or non-compliance with filing requirements.

Common triggers:

• Missing audit report when turnover exceeds Rs 1 crore
• Incorrect ITR form used
• Missing schedules (CG, OS, BP)
• Balance sheet/P&L not attached for business income

Deadline: 15 days from receipt (extendable on request)

Response: Correct the defect and resubmit through the e-filing portal. If the return is treated as invalid under Section 139(9), it is deemed as never filed — respond urgently.

Section 143(1) — Intimation Notice

What it is: Automated processing notice from CPC showing adjustments made to your return. This is the most common notice type.

Common triggers: TDS mismatch, unreported income from AIS, disallowed deductions, arithmetic errors.

Deadline: Must be issued within 21 months from the end of the financial year in which the return is filed.

Response: File rectification under Section 154 or respond through "Response to Outstanding Demand" on the e-filing portal.

Section 143(1)(a) — Prima Facie Adjustment

What it is: CPC makes adjustments for incorrect claims that are apparent from the return itself — such as claiming deductions beyond limits or incorrect application of tax rates.

Important: CPC must send an intimation proposing the adjustment and give 30 days to respond before making the adjustment.

Inquiry & Assessment Notices

Section 142(1) — Inquiry Before Assessment

What it is: The Assessing Officer (AO) requires you to furnish your return of income (if not filed) or produce accounts and documents.

Two sub-types:

• 142(1)(i) — Notice to file return (for non-filers)
• 142(1)(ii) — Notice to produce books of accounts and documents

Deadline: As specified in the notice (usually 15-30 days).

Penalty for non-compliance: Rs 10,000 under Section 271(1)(b).

Section 143(2) — Scrutiny Assessment Notice

What it is: The AO selects your return for detailed scrutiny. This initiates a full assessment process where you must produce evidence for all claims in your return.

Deadline for issue: Within 6 months from end of FY in which the return was filed.

Key point: If this notice is not served within the deadline, the AO cannot proceed with scrutiny. This is a jurisdictional requirement — see PCIT v. Silver Line (2019, Delhi HC).

Section 144 — Best Judgment Assessment

What it is: If you don't respond to 142(1) or 143(2), the AO can complete the assessment based on available information — "best judgment." This almost always results in a high demand.

Response: File an appeal under Section 246A or a revision petition. Prevention is better — always respond to scrutiny notices.

Section 148 — Reassessment Notice

What it is: The AO has "information" suggesting income has escaped assessment and wants to reopen a completed assessment.

Critical change under new law: From AY 2024-25, Section 148 requires:

• Information from risk management system, audit objection, or order of tribunal/court
• Prior approval of specified authority (PCIT for cases up to 3 years, CCIT for 3-10 years)
• Information must be specific, not vague or based on change of opinion

Landmark case: Ashish Agarwal v. PCIT (2022, SC) — Supreme Court converted all invalid 148 notices into Section 148A inquiries, establishing the mandatory requirement of preliminary inquiry before issuing reassessment notices.

Response: Challenge the validity of the notice if procedural requirements are not met. Raise objections within 30 days.

Section 148A — Preliminary Inquiry Before Reassessment

What it is: Before issuing a 148 notice, the AO must conduct an inquiry under 148A, provide the information to the assessee, and consider the response before deciding whether to proceed.

Deadline for response: As specified (usually 7-30 days).

Section 131 — Power to Summon and Examine

What it is: The AO can summon any person to appear and give evidence or produce documents. This is a powerful tool used during search assessments and investigations.

Key point: Non-compliance can lead to prosecution under Section 276D.

Penalty & Prosecution Notices

Section 270A — Penalty for Under-Reporting/Misreporting

What it is: Penalty notice for under-reporting (50% of tax) or misreporting (200% of tax) of income.

Defense: Demonstrate that the under-reporting was due to bona fide explanation and all facts were disclosed. For misreporting, the burden of proof is on the department.

Section 271(1)(c) — Penalty for Concealment (Pre-2017)

What it is: Legacy penalty provision for concealment of income or furnishing inaccurate particulars. Still applicable for AYs up to 2016-17.

Key case: CIT v. SSA's Emerald Meadows (2016, Karnataka HC) — If the notice doesn't specify whether it's for "concealment" or "inaccurate particulars," it's invalid.

Section 156 — Notice of Demand

What it is: Formal demand notice requiring payment of tax, interest, penalty, or any other sum payable. Issued after assessment or penalty order.

Deadline to pay: 30 days from date of service.

Response: Pay, request installment, or file appeal with stay application.

Timeline: When Can the Department Issue Notices?

Notice	Time Limit
139(9) Defective return	During processing
143(1) Intimation	9 months from end of FY of filing
143(2) Scrutiny	6 months from end of FY of filing
148 Reassessment	3 years (normal), 10 years (specified cases) from end of relevant AY
270A Penalty	Within assessment proceedings
154 Rectification	4 years from end of FY of order

What to Do When Your Client Gets a Notice

1. Don't panic — most notices are routine (143(1), 139(9))
2. Check the DIN — every legitimate notice has a Document Identification Number. Verify it on the e-filing portal
3. Note the deadline — mark it immediately and set reminders
4. Download all documents — notice, annexures, computation sheets
5. Verify jurisdiction — is the AO correct? Is the notice within time?
6. Respond within time — late responses weaken your position
7. Keep copies — maintain a complete trail of all correspondence

Using AI to Manage Multiple Notices

For CA firms handling dozens of clients, keeping track of notice types, deadlines, and response strategies across different sections is a significant challenge. AI-powered platforms can automatically classify the notice type, extract key details, and generate initial draft responses — turning a 3-4 hour manual process into a 30-minute review.