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Income Tax

Top 5 Common ITR Filing Mistakes in 2026 to Avoid Notices, Refund Delays & Defective Returns

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Introduction

ITR filing season has started, and many taxpayers still make small but very common mistakes while filing their Income Tax Return. The problem is that these mistakes may look minor initially, but practically they can result in defective returns, notices from the Income Tax Department, refund delays, penalties, and unnecessary compliance issues.

The good thing is that most of these mistakes can be avoided very easily if taxpayers follow a few simple practical steps before filing the return.

One of the biggest practical realities is that many taxpayers focus only on filing ITR quickly but do not properly verify income details, applicable ITR forms, deductions, TDS entries, or e-verification requirements.

Main Discussion

1. Selecting the Wrong ITR Form

One of the most common mistakes people make while filing ITR is selecting the wrong ITR form.

Commonly Applicable ITR Forms

ITR Form Generally Applicable For
ITR-1 Salary income and limited capital gains
ITR-2 Multiple house properties and capital gains
ITR-3 Business or professional income
ITR-4 Presumptive business/professional income

Practically, many taxpayers do not properly check which ITR is applicable and directly select the wrong form.

Practical Impact

Mistake Possible Consequence
Wrong ITR Selection Defective return
Incorrect filing Return revision
Serious mismatch Departmental notice

2. Income Mismatch with AIS and Form 26AS

AIS and Form 26AS practically work like master data available with the Income Tax Department.

Commonly Reflected Transactions

Transaction Type Common Reporting Source
Bank Interest Banks
TDS Entries Deductors
Salary Income Employers
Major Transactions Reporting entities
Business Receipts GST / Other systems

3. Not Reporting All Income

Income Commonly Missed

Income Type Reporting Requirement
Savings Interest Mandatory
Rental Income Mandatory
Capital Gains Mandatory
Mutual Fund Gains Mandatory
Exempt Income Also reportable

4. Wrong or Fake Deduction Claims

Examples of Wrong Claims

Wrong Practice Compliance Risk
Fake rent receipts Misreporting
Incorrect 80C claims Under-reporting
Unsupported deductions Penalty risk

Under-reporting may attract penalty up to 50%, while misreporting with fake documents may attract penalty up to 200%.

5. Filing Near Deadline and Forgetting E-Verification

Practical Risks of Last-Minute Filing

Issue Practical Impact
Portal Glitches Filing issues
Time Pressure Wrong reporting
Missed Details Revision requirement

Practical Impact

  • Defective returns
  • Refund delays
  • Departmental notices
  • Penalties
  • Additional compliance burden

Conclusion

ITR filing is not just about submitting the return quickly. Correct reporting, proper reconciliation, genuine deduction claims, and timely e-verification are equally important for smooth processing and timely refunds.

Taxpayers should avoid rushing the filing process and instead focus on proper compliance, document verification, and correct reporting to reduce future notice and penalty risks.

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For professional support and advisory, you may reach out at [email protected] or WhatsApp +91 81715 82583.

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Author Info

SHUBHAM GOYAL
Qualification: CA in Practice
Company: M/s Shubham And Co
Location: Agra, Uttar Pradesh
Articles Published: 75

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