ITR Filing Guide for AY 2025-26: Documents, Deadlines & Common Mistakes

Understanding Assessment Year 2025-26

Assessment Year (AY) 2025-26 corresponds to the Financial Year (FY) 2024-25, during which you earned income from April 1, 2024 to March 31, 2025. The income tax return you file in 2026 will report this income and determine your tax liability or refund.

With the significant tax reforms introduced in Budget 2025, including the enhanced Section 87A rebate up to ₹12 lakh and the revised tax slabs in the new regime, this year's ITR filing requires careful attention to maximize your tax savings.

Who Needs to File ITR for AY 2025-26?

You are required to file an income tax return if you meet any of the following conditions:

• Your gross total income exceeds the basic exemption limit (₹3 lakh for senior citizens, ₹5 lakh for super senior citizens, and ₹2.5 lakh/₹3 lakh for others depending on the regime)
• You have deposited more than ₹1 crore in current accounts
• Foreign travel expenditure exceeded ₹2 lakh
• Electricity consumption exceeded ₹1 lakh
• You are a beneficial owner or beneficiary of foreign assets
• You want to carry forward losses
• You are claiming tax refunds

Key Deadlines for AY 2025-26

Category	Due Date	Late Fee
Individual/HUF (non-audit cases)	July 31, 2026	₹5,000 (₹1,000 if income ≤ ₹5 lakh)
Business requiring audit	October 31, 2026	₹10,000
Business requiring transfer pricing report	November 30, 2026	₹10,000
Revised/Belated Return	December 31, 2026	Applicable late fee + interest

Complete Document Checklist for ITR Filing

1. Personal Information Documents

• PAN Card: Permanent Account Number is mandatory
• Aadhaar Card: Required for e-verification and linking
• Bank Account Details: Account number, IFSC code, and bank name for refund credit
• Contact Information: Updated mobile number and email ID

2. Income Documents

• Form 16: TDS certificate from your employer (Part A and Part B)
• Form 16A: TDS on non-salary income (interest, commission, rent)
• Salary Slips: Monthly payslips for verification
• Bank Statements: All savings and current account statements for FY 2024-25
• Interest Certificates: From banks, post office, and NBFCs
• Form 26AS: Annual tax statement from TRACES/Income Tax portal
• AIS (Annual Information Statement): Detailed transaction report from the IT portal

3. Investment and Deduction Proofs (for Old Tax Regime)

• Section 80C Investments: PPF, ELSS, LIC premiums, NSC, tuition fees, home loan principal (up to ₹1.5 lakh)
• Section 80D: Health insurance premium receipts (up to ₹25,000 for self/family, ₹50,000 for senior citizen parents)
• Section 80E: Education loan interest certificate
• Section 24: Home loan interest certificate (up to ₹2 lakh)
• Section 80G: Donation receipts for charitable contributions
• NPS Contribution: Tier 1 account statement (additional ₹50,000 under Section 80CCD(1B))

4. Capital Gains Documents

• Stock Trading Statements: From brokers for equity transactions
• Mutual Fund Statements: Capital gains reports from fund houses
• Property Sale Documents: Sale deed, purchase deed, registration papers
• Indexed Cost Calculation: For long-term capital gains on property
• Section 54/54F Proofs: If claiming capital gains exemption

5. Other Income Documents

• Rent Receipts: For rental income reporting
• Freelance/Professional Income: Invoices and payment records
• Dividend Statements: From companies and mutual funds
• Cryptocurrency Transactions: Trading history from exchanges

Which ITR Form to Use?

ITR Form	Who Should Use	Income Sources Allowed
ITR-1 (Sahaj)	Resident individuals with income ≤ ₹50 lakh	Salary, one house property, other sources (interest), agricultural income ≤ ₹5,000
ITR-2	Individuals/HUFs not eligible for ITR-1	Salary, multiple house properties, capital gains, foreign assets, directorship in company
ITR-3	Individuals/HUFs with business/profession income	All income sources including business/profession, partnership firms
ITR-4 (Sugam)	Resident individuals/HUFs opting for presumptive taxation	Business income under Sections 44AD, 44ADA, 44AE (up to ₹2 crore/₹50 lakh limits)

Step-by-Step ITR Filing Process

Step 1: Gather All Documents

Collect all the documents listed above before starting. Ensure your Form 26AS and AIS match your records.

Step 2: Choose the Right Tax Regime

Compare your tax liability under both regimes. With the Budget 2025 changes, the new regime may be more beneficial for many taxpayers. Use the tax regime comparison guide to decide.

Step 3: Login to Income Tax Portal

Visit www.incometax.gov.in and login using your PAN and password. Complete the OTP verification.

Step 4: Select the Correct ITR Form

Go to 'e-File' → 'Income Tax Returns' → 'File Income Tax Return'. Select the assessment year (2025-26) and appropriate ITR form based on your income sources.

Step 5: Fill in Personal Details

Verify your PAN, Aadhaar, contact details, and bank account information. Ensure your bank account is pre-validated for refund credit.

Step 6: Enter Income Details

Input your income from all sources:

• Salary income (auto-populated from Form 16)
• House property income
• Capital gains (short-term and long-term)
• Business/profession income
• Income from other sources

Step 7: Claim Deductions and Exemptions

If opting for the old regime, enter all eligible deductions under Chapter VI-A. The new regime has limited deductions (standard deduction, NPS employer contribution).

Step 8: Verify Tax Computation

Review the auto-calculated tax liability. Check for any mismatch with your own calculations. Verify tax credits from Form 26AS.

Step 9: Submit and E-Verify

Submit your return and e-verify using Aadhaar OTP, net banking, or other available methods. E-verification completes your filing process.

10 Common ITR Filing Mistakes to Avoid

1. Choosing the Wrong ITR Form

Using ITR-1 when you have capital gains or foreign income will result in a defective return. Always select the form that covers all your income sources.

2. Mismatch with Form 26AS/AIS

Not reporting income shown in Form 26AS or AIS will trigger a notice. Always reconcile your income with these documents before filing.

3. Incorrect Bank Account Details

Typos in account numbers or IFSC codes can delay or prevent refund credits. Double-check all bank details.

4. Forgetting to Report Exempt Income

While exempt income doesn't attract tax, it must be reported. This includes agricultural income, long-term capital gains under exemption limits, and tax-free bonds.

5. Missing TDS Credit Claims

Failing to claim TDS credits shown in Form 26AS means paying tax twice. Ensure all TDS entries are included in your return.

6. Wrong Tax Regime Selection

Selecting the wrong regime can cost you thousands in extra taxes. Calculate under both regimes before deciding.

7. Not Reporting All Bank Accounts

You must report all savings and current accounts held in India at any time during the previous year, excluding dormant accounts.

8. Incorrect Deduction Claims

Claiming deductions without proper proof or for ineligible expenses can lead to disallowance and penalties.

9. Missing the Deadline

Late filing attracts penalties (₹5,000 or ₹1,000) and interest under Sections 234A, 234B, and 234C.

10. Not E-Verifying the Return

Filing without e-verification within 30 days makes the return invalid. Set reminders to complete e-verification promptly.

Benefits of Filing ITR on Time

• Timely Refunds: Early filers get faster refunds
• Loan Approvals: ITR is essential for home loans, vehicle loans, and credit cards
• Visa Applications: Most countries require ITR proof for visa processing
• Loss Carry Forward: On-time filing allows carrying forward losses to future years
• Compensation Claims: Required for accident claims and insurance settlements
• Clean Tax Record: Builds credibility with tax authorities

New Changes for AY 2025-26 ITR Filing

• Updated Schedule for Capital Gains: New reporting format for equity and mutual fund transactions
• Enhanced AIS: More comprehensive transaction reporting including cryptocurrency
• Pre-filled ITR: Increased auto-population of income and TDS details
• Co-operative Society Changes: Updated provisions for members of co-operative societies
• VDA Reporting: Separate section for Virtual Digital Assets (cryptocurrency)

What to Do If You Miss the Deadline?

If you miss the July 31 deadline, you can still file a belated return by December 31, 2026 with the following consequences:

• Late fee of ₹5,000 (₹1,000 if income ≤ ₹5 lakh)
• Interest under Section 234A at 1% per month on outstanding tax
• Certain deductions may not be available
• Losses (except house property loss) cannot be carried forward

Conclusion

Filing your Income Tax Return for AY 2025-26 doesn't have to be stressful. Start early, keep your documents organized, and double-check all entries before submission. With the new tax regime benefits from Budget 2025, many taxpayers will find themselves paying less tax this year—ensure you choose the regime that maximizes your savings.

Remember, timely filing not only keeps you compliant but also unlocks benefits like faster refunds, easier loan approvals, and the ability to carry forward losses. Don't wait until the last minute—begin your ITR preparation today.