Income Tax Notice: Types, Reasons, and How to Respond for AY 2026-27

Receiving an income tax notice can feel alarming, but it rarely means you're in serious trouble. Most notices are routine — automated cross-checks, requests for clarification, or adjustments based on data the department already has. Understanding what the notice says and responding correctly is what matters.

This guide covers the most common types of income tax notices, why you might receive one, and exactly how to respond for AY 2026-27.

Why You Might Receive an Income Tax Notice

The Income Tax Department issues notices for a variety of reasons, and most of them are procedural:

• Mismatch between your ITR and Form 26AS/AIS/TIS — for example, you reported less income than what your employer or bank reported
• Arithmetic errors in your return that triggered an automated adjustment
• Not filing your return despite having taxable income reported by deductors
• Claiming deductions or exemptions that don't match the department's records
• High-value transactions flagged through the Statement of Financial Transactions (SFT) — like property purchases, large mutual fund investments, or high cash deposits
• Random selection for detailed scrutiny

The department's data matching capabilities have expanded significantly. With AIS (Annual Information Statement) now capturing mutual fund transactions, property registrations, foreign remittances, and more, the scope for notices based on data mismatches has increased.

Common Types of Income Tax Notices

Section 143(1) — Intimation After Processing

This is the most common notice. Every return filed goes through the Centralised Processing Centre (CPC), which performs automated checks. The intimation under Section 143(1) tells you the outcome:

• No demand, no refund — your return matched perfectly
• Refund adjusted — the department computed a different refund amount
• Demand raised — the department found a discrepancy and you owe additional tax

Common trigger: You claimed a deduction but the corresponding proof wasn't reflected in Form 26AS or AIS. For example, claiming Section 80C for a PPF deposit that the bank reported late.

How to respond: If the adjustment is correct, pay the demand. If it's wrong, file a rectification request under Section 154 on the e-filing portal within 30 days.

Section 139(9) — Defective Return Notice

This notice means your return has a technical defect — missing schedules, inconsistent data across fields, or incomplete information.

Common trigger: Filing ITR-1 when you should have filed ITR-2 (for example, if you had capital gains), or not filling in mandatory fields like salary breakup details.

How to respond: You get 15 days (extendable on request) to file a corrected return. Log in to the e-filing portal, go to "e-Proceedings," and submit the revised return in response to the notice.

Section 148 / 148A — Income Escaping Assessment

This is more serious. The Assessing Officer believes income has "escaped assessment" — meaning you either didn't report income or under-reported it.

Starting AY 2022-23, the department must first issue a notice under Section 148A, which includes:

1. 148A(b) — Information suggesting escaped income, asking for your explanation
2. 148A(d) — An order passed after considering your response, deciding whether to issue a 148 notice

Common trigger: A significant income source visible in AIS/TIS (like property sale, share trading profits, or rental income) that wasn't reported in your ITR.

How to respond: Take this notice seriously. Respond within the time limit (usually 30 days) with complete documentation. If the escaped income allegation is based on data you've already reported, provide evidence. Consider professional help for amounts above ₹5 lakhs.

Section 245 — Adjustment of Refund Against Demand

If you have an outstanding tax demand from a prior year and a refund due for the current year, the department may set off the refund against the demand.

Common trigger: An old demand from a 143(1) adjustment that you didn't address, now being adjusted against your current refund.

How to respond: If the old demand is incorrect, file a rectification or response for the original assessment year first. If it's correct, the adjustment is legitimate.

Section 131(1A) / 142(1) — Request for Information

Under Section 142(1), the department can ask you to furnish specific documents, details about investments, or clarification about entries in your return. This typically arrives before a formal assessment.

Common trigger: Unusual patterns in your financial transactions, or the department wanting documentary proof for deductions claimed.

How to respond: Submit the requested documents through the e-filing portal within the specified timeline. Be thorough but only share what's asked for.

Step-by-Step: How to Respond to Any Income Tax Notice

Step 1: Don't Panic — Verify the Notice

First, verify the notice is genuine. All legitimate notices are available on the Income Tax e-filing portal under Pending Actions → e-Proceedings or Worklist. If a notice doesn't appear there, it may be fraudulent.

Check these details on the notice:

• Your PAN and name
• Assessment year
• Section under which it's issued
• Due date for response
• DIN (Document Identification Number) — every valid notice has one

Step 2: Understand What's Being Asked

Read the notice carefully. Identify:

• What discrepancy or issue the department has flagged
• What specific action you need to take (pay demand, submit documents, file revised return)
• The deadline for your response

Step 3: Cross-Check Your Records

Pull up your original ITR, Form 16, Form 26AS, AIS, and TIS for the relevant assessment year. Compare what you filed against what the department's records show.

Common sources of mismatch:

If you filed with 49Tax, you can revisit your filing data and cross-reference it against your AIS. 49Tax's AI-powered extraction from Form 16 and AIS helps catch many of these mismatches before filing.

Step 4: Prepare and Submit Your Response

For most notices, you'll respond through the e-filing portal:

1. Log in to incometax.gov.in
2. Navigate to Pending Actions → e-Proceedings
3. Select the relevant notice
4. Prepare your response — either agree with the adjustment, partially agree, or disagree with supporting documents
5. Upload supporting documents as PDFs (keep individual files under 5 MB)
6. Submit before the deadline

Pro tip: Always save a copy of your response and the acknowledgment number.

Step 5: Follow Up

After submitting, the department may:

• Accept your response and close the proceedings
• Ask for additional information
• Pass an order (which you can further appeal if you disagree)

Track the status under e-Proceedings on the portal. If you don't hear back within 6 months for a 143(1) rectification, it likely means the matter is resolved.

Time Limits for Responding to Notices

Missing the deadline doesn't automatically mean penalties, but it weakens your position significantly. If you need more time, file an adjournment request through the portal before the deadline passes.

What Happens If You Ignore a Notice?

Ignoring a notice is the worst thing you can do. The consequences escalate:

1. Best-case assessment — the department assesses your income based on whatever information they have, without your input. This usually results in a higher demand.
2. Penalties — under Section 272A, a penalty of ₹10,000 can be levied for failure to comply with a notice.
3. Prosecution — in extreme cases of repeated non-compliance, especially for high-value cases, prosecution proceedings can be initiated.

Even if you think the notice is wrong, respond and state your case. Silence is treated as acceptance.

When to Get Professional Help

You can handle most 143(1) intimations and 139(9) defective return notices yourself. But consider consulting a CA or tax professional if:

• The notice is under Section 148 (escaped income assessment)
• The demand amount exceeds ₹1 lakh
• The notice involves transfer pricing or international transactions
• You're unsure about the legal position on a specific deduction or exemption
• The department has initiated penalty proceedings under Section 270A or 271

Preventing Future Notices

The best way to deal with income tax notices is to avoid them in the first place:

• Reconcile AIS/TIS before filing — download your AIS from the e-filing portal and match every transaction against your records. This is the single most effective step you can take.
• Report all income sources — even small amounts of FD interest, savings account interest under Section 80TTA, or dividend income. The department sees all of it.
• File the correct ITR form — ITR-1 for straightforward salary income, ITR-2 for capital gains and multiple properties. Filing the wrong form is a common trigger for defective return notices.
• Claim only legitimate deductions — with documentation ready in case asked
• File on time — late filing under Section 139(4) attracts more scrutiny and penalties

Key Takeaway

Most income tax notices are routine and manageable. The critical steps are: verify the notice is genuine, understand what's being asked, cross-check against your own records, and respond within the deadline. The worst response is no response at all. If you're filing for AY 2026-27, take 15 minutes to reconcile your AIS with your income records before submitting — it's the simplest way to avoid a notice altogether.