ITR filed and verified? Here's how the Income Tax Department spots mismatches—and when it sends a notice

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CA. Rudransh Suryavanshi   |   Published on: 30-07-2026 | 14 min read

Filing your Income Tax Return (ITR) before the due date is only one part of the compliance process. Many taxpayers assume that once they have successfully filed and e-verified their return, the job is over. However, in 2026, the Income Tax Department has strengthened its data-driven verification process, using information from multiple financial databases to identify inconsistencies before issuing refunds or completing assessments. Every return is electronically compared with tax records, bank information, salary details, investment data, and other financial transactions. Even small mismatches can delay processing or trigger an intimation or notice from the department.

Understanding how this process works can help taxpayers avoid unnecessary notices, delayed refunds, and additional tax demands. Here's a detailed look at how the Income Tax Department processes verified returns and what taxpayers should do to stay compliant.

Filing and E-Verification: Why Both Steps Matter

Many taxpayers believe filing an ITR completes the process. In reality, a return is considered valid only after it has been e-verified within the prescribed time.

Once the return is successfully verified using Aadhaar OTP, Net Banking, Digital Signature Certificate (DSC), Electronic Verification Code (EVC), or other approved methods, it is officially accepted for processing by the Centralized Processing Centre (CPC).

Without verification, the Income Tax Department treats the return as incomplete, meaning it will not be processed for refund or assessment.

What Happens After Your ITR Is Verified?

Once your return reaches the CPC, it goes through multiple automated validation stages before processing begins.

The department checks:

  • Whether the correct ITR form has been used
  • Whether mandatory schedules are complete
  • Mathematical accuracy
  • Tax calculation
  • Details of tax payments
  • Information reported by third parties
  • Eligibility of deductions and exemptions

These checks are largely automated and completed using advanced data matching systems before any human intervention becomes necessary.

How the Income Tax Department Detects Mismatches

The Income Tax Department no longer depends only on the figures entered by taxpayers.

Instead, it compares the information in your ITR with data received from various reporting entities.

These include:

Form 26AS

Form 26AS contains details such as:

  • TDS deducted by employers
  • TDS deducted by banks
  • Advance tax payments
  • Self-assessment tax
  • TCS credits

If the tax credits claimed in your return differ from Form 26AS, the system immediately flags the discrepancy.

Annual Information Statement (AIS)

AIS contains a much broader financial picture.

It includes information related to:

  • Salary
  • Interest income
  • Dividend income
  • Securities transactions
  • Mutual fund purchases
  • Property transactions
  • Foreign remittances
  • High-value purchases
  • Cash deposits

Any income reflected in AIS but omitted from your ITR may lead to additional verification.

Taxpayer Information Summary (TIS)

TIS provides summarized values generated from AIS after considering taxpayer feedback.

It helps the department compare declared income with reported financial activity more efficiently.

Common Reasons Behind Income Tax Notices

Receiving an income tax notice does not automatically mean tax evasion.

Many notices are generated because of routine mismatches or incomplete information.

Some common reasons include:

Incorrect ITR Form

Using the wrong return form can result in the return being treated as defective.

For example:

  • Filing ITR-1 despite having capital gains
  • Using ITR-4 when business conditions are not satisfied

The department may ask the taxpayer to rectify such mistakes.

Income Not Matching AIS

Suppose your bank reports ₹75,000 as interest income, but you disclose only ₹40,000.

The mismatch can trigger automated verification.

Similarly, capital gains, dividends, or foreign income omitted from the return may attract departmental attention.

Wrong TDS Claims

Sometimes taxpayers claim TDS credits that do not appear in Form 26AS.

This usually happens because:

  • Employer has not deposited TDS
  • Wrong PAN quoted
  • Incorrect tax credit claimed

Such cases may lead to adjustments while processing the return.

Excess Deduction Claims

Claiming deductions without supporting evidence or claiming deductions beyond statutory limits can result in tax demand or further inquiry.

Common examples include:

  • Section 80C
  • Section 80D
  • Home loan interest
  • HRA claims

Large Refund Claims

A higher refund amount does not automatically result in scrutiny.

However, unusually large refund claims combined with inconsistent financial information may invite closer examination.

What Is an Intimation Under Section 143(1)?

After completing preliminary validation, the department issues an Intimation under Section 143(1).

This document informs the taxpayer about the outcome of processing.

The intimation generally states one of the following:

  • No demand and no refund
  • Refund payable
  • Additional tax payable

It also explains any adjustments made by the department during processing.

Most taxpayers receive this intimation electronically through the income tax portal and registered email.

Will Every Mismatch Lead to Scrutiny?

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No.

Not every difference automatically results in detailed scrutiny.

Minor calculation errors are often corrected during processing.

However, material inconsistencies involving income, tax credits, deductions, or high-value financial transactions may require additional clarification.

In many cases, taxpayers receive an intimation asking them to respond or rectify specific issues instead of facing a full scrutiny assessment.

Does Filing Early Speed Up Processing?

Experts generally believe that returns filed earlier are processed sooner because the CPC handles returns in the order they are received.

However, early filing does not guarantee faster refunds if significant mismatches exist.

A correctly filed return submitted later may still be processed faster than an early return requiring multiple validations.

Revised Return: Can It Increase Attention?

Many taxpayers hesitate to revise their return because they fear scrutiny.

In reality, filing a revised return is perfectly legal.

A revised return simply allows taxpayers to correct mistakes such as:

  • Missing income
  • Incorrect deductions
  • Wrong bank details
  • Incorrect tax calculations

The department generally focuses on whether the revised figures match available financial records rather than on the act of revision itself.

If corrections genuinely resolve discrepancies, the revised return often helps avoid future complications.

How Refund Processing Works

Once the return successfully clears validation checks, refund processing begins if excess tax has been paid.

The refund is generally credited to the taxpayer's pre-validated bank account after processing is completed.

However, refunds may be delayed if:

  • Bank account is not validated
  • PAN and Aadhaar details do not match
  • Outstanding tax demand exists
  • Return contains unresolved discrepancies

Ensuring accurate bank details before filing can help avoid unnecessary delays.

Practical Tips to Avoid Income Tax Notices

Taxpayers can significantly reduce the chances of receiving notices by following a few simple practices:

  • Compare your return with AIS before filing.
  • Verify Form 26AS carefully.
  • Ensure all salary, interest, dividend, rental and capital gains income is reported.
  • Use the correct ITR form.
  • Keep documentary proof for deductions.
  • Verify bank account details.
  • E-verify the return immediately after filing.
  • Respond promptly if any intimation or notice is received.

Taking these precautions helps ensure smoother processing and quicker refunds.

Final Thoughts

The Income Tax Department's return processing system has become increasingly automated and data-driven. Filing and verifying an ITR no longer marks the end of the compliance journey. Every return is electronically matched against multiple financial databases, including Form 26AS, AIS, TIS, tax payment records, and information reported by banks, employers, and other institutions. While minor mistakes may only result in adjustments, significant mismatches can lead to notices, delayed refunds, or additional verification.

The best approach is simple: report all income accurately, reconcile your records before filing, claim only eligible deductions, and maintain proper documentation. A carefully prepared return not only speeds up processing but also minimizes the chances of receiving an unwanted notice from the Income Tax Department. 


About the Author

Written by CA. Rudransh Suryavanshi • 30-07-2026

CA. Rudransh Suryavanshi focuses on GST compliance, financial management, and internal controls. He regularly contributes content on business accounting solutions and effective tax planning strategies.

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