Filing your Income Tax Return (ITR) is an annual obligation for millions of Indian taxpayers — and for many, a source of anxiety. Choosing the wrong ITR form, missing a deadline, or failing to disclose certain income can result in notices, penalties, or missed refunds. Yet ITR filing, when approached systematically, is straightforward. The Income Tax Department has progressively simplified the process, with pre-filled forms, automated reconciliation, and instant e-verification.
This comprehensive guide covers everything about ITR filing for FY 2025-26 — the correct form for your income type, key due dates, documents you need to keep handy, a step-by-step filing process, and the most common mistakes to avoid.
Who Must File an Income Tax Return?
Filing an ITR is mandatory if your gross total income before deductions exceeds the basic exemption limit (Rs. 2.5 lakh for individuals below 60 years, Rs. 3 lakh for senior citizens, and Rs. 5 lakh for super senior citizens under the Old Regime; Rs. 3 lakh under the New Regime). Beyond income thresholds, ITR filing is also mandatory in certain situations: if you have deposited more than Rs. 1 crore in bank accounts, paid electricity bills exceeding Rs. 1 lakh, incurred foreign travel expenditure above Rs. 2 lakh, or have foreign assets or income.
Filing an ITR is also recommended even when not mandatory — for loan applications, visa processing, carrying forward capital losses, and establishing financial credibility.
Which ITR Form to Choose for FY 2025-26?
Choosing the right ITR form is the first step to accurate filing. ITR-1 (Sahaj) is for resident individuals with total income up to Rs. 50 lakh from salary/pension, one house property, and other sources (interest). ITR-2 is for individuals and HUFs with capital gains, more than one house property, foreign income, or income above Rs. 50 lakh but no business income. ITR-3 is for individuals and HUFs with income from business or profession, including F&O traders. ITR-4 (Sugam) is for individuals, HUFs, and firms opting for presumptive taxation under Sections 44AD, 44ADA, or 44AE. ITR-5, ITR-6, and ITR-7 are for partnerships, companies, and trusts/institutions respectively.
Important ITR Due Dates for FY 2025-26
For non-audit cases (individuals, HUFs without audit requirement), the ITR due date for FY 2025-26 is July 31, 2026. For audit cases (businesses and professionals whose accounts require tax audit), the due date is October 31, 2026. For cases involving transfer pricing reports, the due date is November 30, 2026. Late filing attracts a penalty of Rs. 5,000 (reduced to Rs. 1,000 if total income is below Rs. 5 lakh), and forfeits the ability to carry forward most capital and business losses.
Documents Checklist for ITR Filing
Having your documents ready before starting the filing process saves significant time and prevents errors. Essential documents include: PAN and Aadhaar cards. Form 16 from your employer (for salaried individuals). Form 16A from banks and deductors for TDS on non-salary income. Form 26AS and Annual Information Statement (AIS) from the Income Tax portal. Bank account statements for interest income. Mutual fund capital gains statements from CAMS or KFintech. Stock trading statements with capital gains computation from your broker. Rent receipts and landlord details (for HRA claim). Home loan interest certificate from your bank. Investment proofs for 80C, 80D, and other deductions.
Step-by-Step ITR Filing Process Online
Step 1: Log in to incometax.gov.in with your PAN and password. Step 2: Go to ‘File Income Tax Return’ under ‘e-File’. Step 3: Select the assessment year (AY 2026-27 for FY 2025-26), the mode (online), and the correct ITR form. Step 4: Review the pre-filled data (pulled from Form 26AS, AIS, and employer TDS data). Correct any discrepancies. Step 5: Fill in income details across all heads, claim applicable deductions, and select your tax regime. Step 6: Compute tax, verify the summary, and pay any self-assessment tax if applicable (using Challan ITNS 280). Step 7: Preview and submit the ITR. Step 8: E-verify immediately using Aadhaar OTP, EVC through net banking, or send a physical signed ITR-V to CPC Bengaluru within 30 days.
Common Mistakes to Avoid When Filing ITR
Filing the wrong ITR form is the most common error, particularly for taxpayers with capital gains who mistakenly file ITR-1 instead of ITR-2. Not reconciling income with AIS leads to notices — always check your AIS for bank interest, dividends, and stock transactions before filing. Forgetting to e-verify the return makes the filing invalid — the return is treated as not filed until verification. Incorrect bank account details can delay refunds significantly. Not claiming eligible deductions when you have proof is leaving money on the table.