AIS Mismatches That Trigger Income Tax Notices (AY 2026-27)

ITAI Blogger

May 23, 2026

Have you filed your ITR for FY 2024-25 and suddenly received a notice under Section 143(1) or even a communication under Section 148A? In many cases, the reason is simple: AIS mismatch.

The Annual Information Statement (AIS) has become one of the Income Tax Department’s most powerful data tools. If your return does not match the information in AIS or TIS, it can automatically trigger scrutiny. In this guide, we explain the Common AIS Mismatches That Can Trigger an Income Tax Notice After Filing ITR, how to fix them, and how to avoid problems in AY 2026-27.

What Is AIS and Why It Matters for AY 2026-27?

The Annual Information Statement (AIS) is a detailed statement available on the Income Tax e-filing portal. It shows:

Interest income from banks and post offices
Dividend income
Capital gains from shares and mutual funds
High-value SFT transactions
GST turnover (for businesses)
Foreign remittances
TDS and TCS entries

You can access AIS under “Services → Annual Information Statement” at the Income Tax e-Filing Portal.

AIS is much more detailed than Form 26AS. According to the Income Tax Department, AIS provides a comprehensive view of financial transactions to help taxpayers file accurate returns.

If there is an AIS vs Form 26AS mismatch after filing ITR FY 2025-26, the system may automatically issue an adjustment under Section 143(1) of the Income Tax Act.

Common AIS Errors Leading to Section 143(1) Income Tax Notice

1. Interest Income Mismatch in AIS and Form 26AS India

Most common issue.

AIS captures:

Savings account interest
FD and RD interest
Post office deposits
Interest on income tax refund

Many taxpayers report only TDS-based interest (shown in Form 26AS) and forget:

Interest below ₹40,000 where no TDS was deducted
Multiple bank accounts
Co-operative bank interest

Example:

AIS shows total FD interest of ₹1,80,000
You reported only ₹1,20,000
Difference: ₹60,000

You may receive an intimation under Section 143(1) for under-reporting.

Refer to interest income reporting guidance on the Income Tax Department portal.

2. Capital Gains Mismatch in AIS for Shares and Mutual Funds

AIS captures:

Sale value of shares
Mutual fund redemptions
Buyback proceeds
Corporate bonds transactions

Many taxpayers report only net gains, while AIS reflects gross sale value.

Common mistakes:

Incorrect grandfathering calculation (for pre-31 Jan 2018 equity)
Ignoring off-market transfers
Not reporting loss transactions

If the department sees high turnover but no capital gains reported, it may issue a mismatch communication.

This is one of the most frequent Common AIS Mismatches That Can Trigger an Income Tax Notice After Filing ITR.

3. High-Value SFT Transactions Reflected in AIS but Not in ITR

SFT (Statement of Financial Transactions) is filed by banks, mutual funds, registrars, etc., under Rule 114E.

Examples of reportable transactions:

Cash deposits above ₹10,00,000 in savings accounts
Fixed deposits above ₹10,00,000
Credit card payments above ₹10,00,000 in cash
Purchase of mutual funds above ₹10,00,000
Purchase of immovable property above ₹30,00,000

If your ITR shows income of ₹6,00,000 but AIS reflects property purchase of ₹45,00,000, it can raise red flags.

You can review SFT details inside AIS.

4. TDS Mismatch Between AIS and ITR

Common errors:

Claiming excess TDS
Claiming TDS in wrong AY
Not reporting corresponding income

If you claim ₹1,20,000 TDS but the income linked to it is not disclosed, the CPC may adjust your refund under Section 143(1).

Check Form 26AS via TRACES at https://www.tdscpc.gov.in.

5. TIS and AIS Reconciliation Before Filing ITR AY 2026-27

TIS (Taxpayer Information Summary) is a summarized version of AIS.

Many taxpayers rely only on TIS totals and ignore detailed AIS entries.

If:

You modify AIS feedback
But do not reflect it correctly in ITR
Or file before updated AIS data is processed

Mismatch arises.

Always complete TIS and AIS reconciliation before filing ITR AY 2026-27.

6. Business Turnover Mismatch (GST vs AIS vs ITR)

AIS may reflect:

GST turnover
TDS under Section 194Q or 194R
E-commerce TCS

If your ITR turnover is lower than GST filings, the system may flag discrepancy.

Cross-check with GST portal at https://www.gst.gov.in.

Can AIS Mismatch Lead to Section 148A Notice?

Yes, in serious cases.

If large discrepancies exist and income appears to have escaped assessment, the department may issue:

Section 148A(b) notice (opportunity to be heard)
Followed by reopening under Section 148

As per provisions updated by Finance Act 2021 and subsequent amendments, reassessment can be initiated within specified time limits based on quantum of escaped income.

Large AIS mismatches involving ₹50,00,000 or more in a year increase scrutiny risk.

This is why addressing Section 148A notice due to AIS information mismatch promptly is critical.

How to Correct AIS Mismatch in Income Tax Portal India

Step 1: Check AIS Details

Step 2: Submit Feedback in AIS

You can mark entries as:

Information is correct
Information is not fully correct
Information relates to other PAN
Duplicate entry

The department updates TIS after feedback processing.

Step 3: If ITR Already Filed

You have two options:

Option A: Revised Return (Section 139(5))

If within time limit:

File revised return correcting mismatch.

Option B: Updated Return Under Section 139(8A) for AIS Discrepancies

If time limit for revision is over:

You can file Updated Return (ITR-U)
Allowed within 24 months from end of relevant AY
Additional tax of 25% or 50% applies

Details available on the Income Tax portal.

This is the safest way to correct underreported income due to AIS mismatch.

How to Respond to 143(1) Notice for AIS Mismatch

If you receive an intimation:

Login to e-filing portal
Go to “e-Proceedings” or “Pending Actions”
Compare department computation
Accept or submit response

For incorrect adjustments, submit online response with justification and supporting documents.

This is called E-verification response to income tax notice for AIS mismatch.

Respond within 30 days to avoid demand becoming final.

Practical Example: Real-World Scenario

Case Study

Mr. Sharma filed ITR for AY 2026-27 declaring income of ₹9,80,000.

AIS reflected:

FD interest: ₹2,40,000
Reported in ITR: ₹1,70,000
Difference: ₹70,000

He received a 143(1) adjustment adding ₹70,000 plus interest under Section 234B and 234C.

Instead of disputing incorrectly, he:

Checked AIS
Confirmed missing FD
Filed Updated Return under Section 139(8A)
Paid tax + 25% additional tax

Matter resolved without escalation to Section 148A.

How to Avoid AIS vs Form 26AS Mismatch After Filing ITR FY 2025-26

Follow this checklist:

Before Filing ITR

Download AIS and TIS
Download Form 26AS
Reconcile bank interest manually
Match capital gains with broker statement
Verify SFT entries
Cross-check GST turnover (if applicable)
Ensure TDS claimed equals income reported

After Filing ITR

Monitor e-filing portal regularly
Check for AIS updates
Respond to communications immediately

Doing TIS and AIS reconciliation before filing ITR AY 2026-27 reduces notice risk drastically.

Frequently Asked Questions

Is AIS legally binding?

AIS is an information tool. However, the department uses it for automated comparison during processing under Section 143(1).

What if AIS contains wrong data?

Submit feedback in AIS immediately. Keep documentary evidence.

Can minor mismatches trigger notice?

Yes. Even small differences can result in automated adjustments.

Is capital gains mismatch common?

Yes. Capital gains mismatch in AIS for shares and mutual funds is one of the top reasons for notices due to incorrect reporting of sale value.

Final Thoughts: Don’t Ignore AIS in AY 2026-27

The era of manual scrutiny is fading. Today, notices are mostly system-generated based on data analytics.

The most common triggers include:

Interest income mismatch in AIS and Form 26AS India
High-value SFT transactions reflected in AIS but not in ITR
Capital gains mismatch in AIS for shares and mutual funds
TDS inconsistencies
Business turnover differences

If you detect discrepancies, act quickly. Use revised return or Updated return under Section 139(8A) for AIS discrepancies where needed. Always submit E-verification response to income tax notice for AIS mismatch within deadline.

For AY 2026-27, proactive TIS and AIS reconciliation before filing ITR is not optional. It is essential.

Review your AIS today. It may save you from tomorrow’s income tax notice.

This content is AI Generated, use for reference only.