An income tax notice can feel alarming especially the first time you get one. But most notices are routine. The Income Tax Department sends lakhs of them every year, mostly because of small mismatches between your return and the data it already holds, like your Form 26AS or Annual Information Statement (AIS). The real risk isn’t the notice itself. It’s not knowing which type you’ve received, missing the response deadline, or replying incorrectly. That’s when a routine notice turns into a scrutiny case, a tax demand, or a penalty. This guide explains all 8 types of income tax notices in India, what triggers each one, exactly how much time you have to respond, and what happens if you don’t. GVC Audit has represented businesses and individuals across Gurgaon, Delhi, Noida, Faridabad, and Delhi NCR in front of the Assessing Officer on cases ranging from a simple 143(1) intimation to full Section 148 reassessments every case reviewed personally by founder CA Varun Gupta, not passed to a junior.
Common Reasons for Income Tax Notices in India
Since AIS and Form 26AS now capture almost every financial transaction salary, interest, dividends, property deals, high-value card spends, mutual fund transactions the system automatically flags mismatches with your filed ITR. The most common reasons for income tax notices are:
- Income reported in AIS but not in your ITR (bank interest, FD interest, dividends)
- TDS credit mismatch between your return and Form 26AS
- High-value transactions without a corresponding ITR (property purchase, large cash deposits)
- Errors or missing details in the return itself (defective return)
- Claiming deductions or exemptions the department wants to verify
- Random or risk-based scrutiny selection under CASS (Computer Assisted Scrutiny Selection)
- Non-filing of a return despite taxable income or high-value transactions
If any of these sound familiar, the fastest way to know your exact exposure is a quick reconciliation of your Form 26AS and AIS against your filed return our team runs this as part of every notice-response engagement.
The 8 Types of Income Tax Notices in India
There are 8 common types of income tax notices in India: Section 139(9) (defective return), Section 142(1) (inquiry before assessment), Section 143(1) (intimation), Section 143(2) (scrutiny), Section 148/148A (income escaping assessment), Section 156 (demand notice), Section 245 (refund adjustment), and Section 271-series (penalty notices). Each has a fixed response window usually 15 to 30 days and ignoring any of them can lead to an ex-parte order, extra tax demand, or penalty. Always verify the notice’s DIN on the income tax e-filing portal before responding.
1. Notice under Section 139(9) Defective Return
What it means: Your ITR has an error or missing information wrong ITR form, mismatched income heads, or an incomplete schedule.
Response time: 15 days from the date of intimation (extendable on request to the Assessing Officer).
What happens if ignored: Your return is treated as if it was never filed, which can mean losing the ability to carry forward losses and missing the original filing deadline altogether.
2. Notice under Section 142(1) Inquiry Before Assessment
What it means: Sent before your assessment is completed. It can ask you to file a return you haven’t filed yet, or to submit specific books of accounts, documents, or details the Assessing Officer needs.
Response time: As specified in the notice typically 15–30 days.
What happens if ignored: The Assessing Officer can proceed to a best judgment assessment under Section 144, often resulting in a higher tax demand than your actual liability, and can initiate penalty proceedings under Section 271(1)(b).
3. Notice under Section 143(1) Intimation
What it means: An automated, computer-generated intimation after your return is processed. It either confirms your return matches department records, shows a refund, or flags a small demand or adjustment.
Response time: No response is needed if you agree with it. If you disagree, file a rectification request under Section 154, or respond within the window stated (usually 30 days for adjustments under Section 143(1)(a)).
What happens if ignored: If it shows a demand and you don’t pay or respond, interest keeps accruing and it can lead to recovery proceedings.
4. Notice under Section 143(2) Scrutiny Assessment
What it means: Your return has been picked up for detailed scrutiny through CASS or manual selection. The Assessing Officer wants to verify specific claims, deductions, or the correctness of your income computation in depth.
Response time: The notice must be served within 3 months from the end of the financial year in which the return was filed; your reply deadline is stated in the notice, generally 15–30 days per hearing.
What happens if ignored: Non-appearance can lead to a best judgment assessment under Section 144, disallowance of deductions, and a significantly higher tax outgo than a well-represented case would produce.
5. Notice under Section 148 / 148A Income Escaping Assessment
What it means: The department believes income has escaped assessment in a prior year. Since the Finance Act 2021 amendment, a Section 148A show-cause notice is issued first, giving you a chance to explain before a formal Section 148 reassessment notice is issued.
Response time: Typically 7–30 days for the 148A show-cause notice, as specified.
Time limit for issuing the notice: Generally within 3 years from the end of the relevant assessment year; up to 10 years if the escaped income is Rs. 50 lakh or more, subject to approval from a specified authority. These limits are amendment-sensitive confirm the current provision and any Income-tax Act, 2025 transition rule for your specific assessment year before relying on a fixed figure.
What happens if ignored: The Assessing Officer can proceed straight to reassessment based only on available information generally to the taxpayer’s disadvantage.
6. Notice under Section 156 Demand Notice
What it means: A formal notice specifying the tax, interest, penalty, or other sum payable following an assessment or reassessment order.
Response time: Payment is due within 30 days of service (the Assessing Officer can shorten this in specific cases with prior approval).
What happens if ignored: You’re treated as an “assessee in default.” This attracts interest under Section 220(2) at 1% per month and can lead to recovery action, including attachment of bank accounts or property.
If you disagree with the demand, you can file a stay application or an appeal before the Commissioner (Appeals) within the same 30-day window don’t let the deadline pass while you’re still deciding.
7. Notice under Section 245 Adjustment of Refund Against Outstanding Demand
What it means: If you have a refund due for one year but an outstanding demand from another year, the department can adjust the refund against that demand instead of paying it out.
Response time: You typically get a window commonly around 21–30 days, as stated in the notice to respond via the e-filing portal before the adjustment is finalised.
What happens if ignored: The adjustment goes through automatically, and you lose the chance to contest the original demand at this stage. If the underlying demand was itself incorrect, you’ll need to separately challenge it through rectification or appeal which is harder to do after the adjustment is complete.
8. Notices under the Section 271 Series Penalty Notices
What it means: Penalty show-cause notices for specific defaults for example, Section 271(1)(b) for non-compliance with a 142(1)/143(2) notice, Section 271B for a tax audit default, Section 271H for TDS return defaults, or Section 270A for under-reporting or misreporting income.
Response time: As specified in the notice, generally 15–30 days.
What happens if ignored: The penalty is levied without your explanation being considered. Section 270A penalties alone can go up to 200% of the tax on under-reported income, and Section 271H penalties can reach Rs. 1 lakh for TDS return defaults both are avoidable with a timely, well-documented reply.
Income Tax Notice Time Limits Quick Reference Table
| Notice Type | Section | Typical Response Time | Time Limit to Issue |
|---|---|---|---|
| Defective Return | 139(9) | 15 Days | Within processing of the return. |
| Inquiry Notice | 142(1) | 15–30 Days | Before the assessment is completed. |
| Intimation | 143(1) | 30 Days (if disputing) | Within 9 months from the end of the financial year in which the return is filed. |
| Scrutiny Assessment | 143(2) | 15–30 Days Per Hearing | Within 3 months from the end of the financial year of filing. |
| Reassessment Show-Cause | 148A | 7–30 Days | Case-specific; verify the applicable statutory time limit. |
| Reassessment | 148 | As Specified in the Notice | Within 3 years; up to 10 years where escaped income is ₹50 lakh or more (subject to applicable law). |
| Demand Notice | 156 | 30 Days | Issued after the assessment or reassessment order. |
| Refund Adjustment | 245 | Approximately 21–30 Days | Before the income tax refund is released. |
| Penalty Notices | 271 Series | 15–30 Days | Case-specific depending on the nature of the proceedings. |
*Time limits under Sections 148/148A are amendment-sensitive and were revised by the Finance Act 2021 and subsequent Finance Acts. Confirm the applicable limit at the time of filing or response, especially given the transition to the Income-tax Act, 2025, effective April 2026. For the current statutory text, see the Income Tax Department’s official Acts & Rules page.
How to Check If Your Income Tax Notice Is Genuine
Fraudulent notices and phishing emails are common. Before responding to anything:
- Check the DIN (Document Identification Number) printed on the notice.
- Go to the income tax e-filing portal → Authenticate Notice/Order Issued by ITD → enter the DIN or PAN and other details.
- If the DIN doesn’t match or is missing, the notice is very likely not genuine — don’t click any links or share OTPs.
CBDT has periodically clarified the treatment of unnumbered communications — a missing DIN is a strong red flag but should be verified on the portal rather than assumed to automatically make a notice void either way. When in doubt, have a CA verify it before you respond or ignore it.
How to Download Your Income Tax Notice Online
If you’ve heard about a notice but don’t have a copy, here’s how to find it:
- Log in at incometax.gov.in with your PAN and password.
- Go to Pending Actions → e-Proceedings, or Compliance Portal, depending on the notice type.
- Open the relevant proceeding and download the notice as a PDF it will show the DIN, section, and assessment year.
- For older intimations (like a Section 143(1)), check e-File → Income Tax Returns → View Filed Returns → Intimation.
Keep a saved copy the moment you find it you’ll need it for your CA and for your own compliance records.
How to Respond to Any Income Tax Notice
- Read it fully: identify the exact section, assessment year, and what’s being asked.
- Verify authenticity : via the DIN check above.
- Note the deadline immediately : most notices give 15–30 days, and it passes faster than you expect.
- Gather documents : Form 26AS, AIS, bank statements, investment proofs, the relevant ITR, and anything specific to the notice.
- Draft a factual, point-by-point response: match your reply to exactly what was asked; avoid vague explanations.
- File through the e-filing portal under the relevant proceeding, or through a CA acting as your authorised representative.
- Keep a copy of everything you submit, including the acknowledgement.
For anything beyond a simple 143(1) intimation especially 143(2) scrutiny, 148/148A reassessment, or a Section 156 demand professional representation matters. These involve legal interpretation, documentation strategy, and often direct engagement with the Assessing Officer, which is where an experienced CA measurably reduces your final liability and risk.
Get Expert Help With Your Income Tax Notice — Book a Free Consultation →
Common Mistakes Businesses and Individuals Make
- Ignoring the notice because it “looks like spam”
- Missing the response deadline while still gathering documents
- Replying without verifying the DIN first
- Sending an incomplete or generic response
- Not reconciling Form 26AS and AIS before filing, which is what triggers most notices in the first place
- Attempting to handle a Section 143(2) scrutiny or Section 148 reassessment without professional representation
- Not retaining supporting documents for the required 8-year period
Startups and growing MSMEs run into a related pattern: a rushed private limited company registration or a scaling business (see scaling from ₹10 lakh to ₹1 crore) without a proactive compliance calendar, which is exactly when AIS mismatches and TDS notices start appearing.
Frequently Asked Questions
The main types are Section 139(9) (defective return), Section 142(1) (inquiry), Section 143(1) (intimation), Section 143(2) (scrutiny), Section 148/148A (reassessment), Section 156 (demand), Section 245 (refund adjustment), and Section 271-series (penalty). Each serves a different purpose, from routine processing to detailed investigation.
There's no single official "four types" classification. That phrasing usually refers informally to the four most common notices taxpayers encounter: Section 143(1) intimation, 142(1) inquiry, 143(2) scrutiny, and 148 reassessment. In practice, there are more than four distinct notice types under the Income Tax Act.
This is a different topic from notices. India taxes income under five heads: salary, house property, profits and gains of business or profession, capital gains, and income from other sources. Total tax liability is computed by combining income across these five heads.
Broadly, India's tax system includes income tax, corporate tax, GST, customs duty, excise duty on select goods, property tax, and professional tax though classifications vary depending on whether direct and indirect taxes are counted separately.
The most common reasons are a mismatch between your ITR and AIS/Form 26AS data, unreported interest or capital gains, high-value transactions without a matching ITR, TDS credit mismatches, defective returns, and random or risk-based scrutiny selection.
Most notices give 15 to 30 days to respond, but the exact period is always stated on the notice itself. Section 156 demand notices give 30 days for payment, while 139(9) defective return notices give 15 days.
A Section 142(1) notice can be issued any time before the assessment is completed. The response time is whatever is specified on the notice typically 15 to 30 days.
A Section 148A notice is a show-cause notice sent before reassessment, giving you a chance to explain why income shouldn't be treated as having escaped assessment. Only after considering your reply does the department decide whether to issue a formal Section 148 reassessment notice.
Generally within 3 years from the end of the relevant assessment year, extendable up to 10 years if the escaped income is Rs. 50 lakh or more, subject to approval. This limit has changed through recent Finance Acts, so confirm the applicable rule for your specific assessment year.
Scrutiny notice timelines are periodically revised through Finance Acts and CBDT instructions. Rather than relying on a fixed figure, check the current provision or ask a CA to confirm the applicable deadline for your assessment year.
It's a formal notice specifying the exact tax, interest, or penalty amount you owe following an assessment or reassessment order. You must pay within 30 days or file an appeal or stay application.
Talk to a CA Before You Respond
Whether it’s a routine Section 143(1) intimation or a full Section 143(2) scrutiny case, GVC Audit’s Income Tax & Direct Tax team represents businesses and individuals across Gurgaon, Delhi, Noida, Faridabad, and Delhi NCR in front of the Assessing Officer every case personally reviewed by founder CA Varun Gupta (ICAI-registered Chartered Accountant), not passed off to a junior. If you’re also weighing broader compliance support, our Top CA Firms in Gurgaon guide breaks down what to look for.