Receiving an income tax notice can be alarming — but most are routine and easily resolved. The key is knowing which section the notice is under, what it's asking for, and responding correctly within the deadline. Ignoring a notice, however, can escalate into assessment orders, penalties, and recovery proceedings.
Why You Might Receive an Income Tax Notice
The Income Tax Department sends notices for a variety of reasons — many of them routine. Common triggers include:
- Mismatch between income declared in your ITR and data in Form 26AS / AIS
- High-value transactions (above ₹10 lakh in bank, property sale, FD) flagged by SFT (Statement of Financial Transactions)
- Non-filing of ITR when taxable income exists
- Errors or omissions in your ITR (missing schedules, wrong deductions)
- Random scrutiny selection by the department's CASS (Computer Aided Scrutiny Selection) system
- Claims for large refunds triggering verification
- Information received from third parties (banks, registrars, employers)
Key Notice Types and What They Mean
Section 143(1): Intimation — Most Common, Least Scary
This is an automated intimation (not a notice in the traditional sense) generated after your ITR is processed. It shows the tax department's computation of your income and tax vs what you filed. If there's a mismatch (e.g., a deduction not allowed, or TDS figure differs), it shows a demand or additional refund. Response: If you agree with the computation, pay the demand. If you disagree, file a rectification under Section 154 online.
🟢 Low alarm level — 143(1)Section 143(1) intimation is routine. Most taxpayers receive one after filing. It doesn't mean you're under scrutiny. Read it carefully and act only if there's a genuine demand or error.
Section 139(9): Defective Return Notice
Your ITR has been filed but has technical errors that make it incomplete — wrong ITR form chosen, schedules not filled, verification not done. You get 15 days to correct and refile. If you miss the deadline, the return is treated as not filed.
Section 143(2): Scrutiny Notice — Pay Attention
This is a formal scrutiny notice — the department wants to examine your ITR in detail. Must be issued within 6 months from the end of the financial year in which the ITR was filed. You'll be asked to produce documents, books, and explanations. Respond through the e-Proceedings portal (incometax.gov.in) — do not visit the AO unless asked.
⚠ 143(2) is serious: Missing the response deadline can result in a best-judgement assessment (Section 144) where the AO determines your income without your input — often resulting in large tax demands. Always respond with complete documentation.
Section 148 / 148A: Reassessment Notice
Issued when the department believes income has escaped assessment — i.e., you underreported income in a past year. Process under 148A requires the AO to give you a chance to be heard before issuing the 148 notice. Time limits for reassessment: 3 years from end of assessment year for income below ₹50 lakh; up to 10 years if escaped income exceeds ₹50 lakh.
Section 156: Notice of Demand
Issued after an assessment order, asking you to pay a specific tax demand within 30 days. If you disagree, file an appeal with the CIT(A) within 30 days and apply for a stay of demand during the appeal.
Section 131: Summons
Requires your personal attendance before the tax officer, or production of specific documents. Rare but serious — typically in complex investigation cases. Do not ignore; consult a CA or tax advocate immediately.
Complete Notice Type Reference
| Section | Notice Type | Response Deadline | Alarm Level |
|---|
| 143(1) | Intimation after processing | Pay demand / rectify within 30 days | Low |
| 139(9) | Defective return | 15 days to correct | Low |
| 143(2) | Scrutiny notice | As specified (typically 15–30 days) | Medium-High |
| 142(1) | Inquiry before assessment | As specified | Medium |
| 148A | Pre-reassessment hearing | 7–30 days | High |
| 148 | Reassessment | File ITR within time specified | High |
| 156 | Demand notice | 30 days to pay | High |
| 131 | Summons | Date specified in notice | Very High |
| 271 | Penalty proceedings | As specified | High |
How to Respond to a Notice: Step by Step
- Read the notice carefully: Note the section, date of issue, assessment year it refers to, and response deadline. Some notices have very short deadlines (7–15 days).
- Verify authenticity: All genuine IT notices have a Document Identification Number (DIN). Verify it on the income tax e-filing portal. Fake IT notices are common — never pay based on a notice you haven't verified.
- Gather documents: Collect all relevant records — Form 16, bank statements, investment proof, sale deeds, whatever the notice is about.
- Respond through e-Proceedings: Log in to incometax.gov.in → Pending Actions → e-Proceedings. Upload your response and supporting documents. Maintain an acknowledgement.
- Consult a CA for 143(2) or 148: Complex scrutiny or reassessment notices require professional handling.
Penalties for Not Responding
- Best-judgement assessment (Section 144): If you don't respond to a 143(2) or 142(1) notice, the AO assesses your income arbitrarily — almost always resulting in a large tax demand
- Penalty under Section 272A: ₹10,000 for failure to comply with a notice
- Prosecution under Section 276CC: In extreme cases of wilful non-compliance, criminal prosecution is possible
Cross-check your ITR with Form 26AS and AIS before filing every year to proactively identify mismatches. Also see our guide on revised and updated ITRs for correcting past errors proactively.
Frequently Asked Questions
I received a Section 143(1) notice showing a demand — what should I do? ▼
A 143(1) intimation with a demand means the department's computation differs from yours. First, check if the demand is due to a genuine error (e.g., TDS not properly claimed, wrong deduction amount) or a mismatch. If you agree the demand is correct, pay it through Challan 280 on the tax portal and submit the response. If you believe the department's computation is wrong, file a Rectification Request under Section 154 on the e-filing portal, attaching proof of your claim. Do not ignore a 143(1) demand — it accrues interest at 1% per month until paid.
Can a notice be sent for years-old ITR? ▼
Yes. The department can reopen assessments under Section 148 for up to 3 years from the end of the relevant assessment year in normal cases (income escaped below ₹50 lakh), and up to 10 years if the escaped income exceeds ₹50 lakh. However, reassessment beyond 3 years requires the case to be referred by a PCIT/CCIT-level officer and requires evidence of substantial income escape. For AY 2017-18 onwards, the new reassessment regime under Sections 147-151 (post Finance Act 2021) applies.
What is a DIN and how do I verify a tax notice is genuine? ▼
DIN stands for Document Identification Number — a unique 20-digit number that must appear on all communications from the Income Tax Department issued on or after 1 October 2019. If a notice doesn't have a DIN, it's either fake or issued before October 2019 (for older periods). To verify: go to incometax.gov.in → Authenticate Notice/Order Issued by ITD, enter the DIN and PAN, and confirm the notice is genuine. Never respond to notices that you haven't verified, and never pay based on phone calls or WhatsApp messages claiming to be from the IT department.