How to File ITR Online in India — Complete Step-by-Step Guide 2026

ITR form selection for FY 2025-26: ITR-1 (Sahaj): salaried income up to Rs50L, one house property, bank interest, no capital gains, no business income. File if: only salary + FD interest + small other income. ITR-2: salaried/pension with capital gains (MF redemptions, stock sales, property sale), multiple house properties, foreign assets/income, income above Rs50L. File if: you redeemed any MF or sold any stock in FY 2025-26. ITR-3: all income types including business or professional income. File if: freelancer, consultant, trader, or anyone with ITR-2 needs plus business income. ITR-4 (Sugam): presumptive tax under 44ADA (professionals), 44AD (businesses) or 44AE. Simple form for small business/professional income. Cannot be used if: capital gains from MF/stocks exist (use ITR-3 instead). ITR-5 and beyond: firms, LLPs, companies, trusts — not for individuals. Critical rule: when in doubt between ITR-1 and ITR-2 — choose ITR-2. It captures everything ITR-1 does and more. Never use ITR-1 if you had any capital gains transaction (even Rs100 from a MF dividend reinvestment can make you ITR-2 eligible).

Complete ITR filing process online (incometax.gov.in): Step 1 — Review AIS (Annual Information Statement): download from e-file → AIS → View AIS. Check all income: salary, bank interest, dividends, MF transactions, property sale. Ensure no surprises. Step 2 — Gather documents: Form 16 (from employer), Form 26AS (TDS certificate — download from portal), bank account statements, capital gains statements (CAMS/KFintech for MF), broker capital gains P&L. Step 3 — Choose ITR form (as above). Step 4 — Select regime: old or new. Use calculator at portal or CalcWise.finance. Step 5 — Login to incometax.gov.in → e-File → Income Tax Returns → File Income Tax Return → Select AY 2026-27. Step 6 — Mode: Online. Portal will pre-fill significant data from AIS/26AS. Review and correct each section. Step 7 — Enter deductions (80C, 80D, HRA, home loan) if old regime. Step 8 — Preview computed tax. Check if tax payable or refund. Pay any balance tax via Challan 280 before submission. Step 9 — Submit return. Step 10 — E-verify within 30 days (Aadhaar OTP is fastest — takes 2 minutes).

E-verification is the electronic equivalent of signing and submitting your ITR. Without e-verification within 30 days, the ITR is treated as invalid. Methods (fastest to slowest): (1) Aadhaar OTP (recommended): on the EPFO portal after submission → Verify Now → Aadhaar OTP → enter OTP received on Aadhaar-linked mobile. Takes 2 minutes. Most reliable. (2) Net banking EVC (Electronic Verification Code): generate EVC via your bank’s net banking portal → enter in ITR portal. Works for all major banks. (3) Demat account EVC: generate EVC via your CDSL/NSDL demat account. (4) Bank ATM (SBI, Axis, Canara Bank): visit ATM → generate EVC for income tax → enter in portal. (5) Signed ITR-V by post: last resort. Print ITR-V acknowledgement → sign in blue ink → send to CPC Bengaluru by ordinary post within 30 days. Very slow (CPC takes 30-60 days to process). E-verification is the key that makes your ITR legally valid. Never submit an ITR without immediately e-verifying on the same session.

Tax refund process after ITR filing: (1) Pre-validate bank account: incometax.gov.in → My Profile → Bank Accounts → Add and Pre-validate. Enter account number, IFSC, and verify via EVC/Aadhaar OTP. This is where refund is credited — must be done before expecting refund. (2) File ITR on time: July 31 deadline (October 31 if audit required). Late filing delays refund by 45-90 days. (3) Verify ITR within 30 days: refund processing only begins after e-verification. (4) Track refund: incometax.gov.in → e-File → Income Tax Returns → View Filed Returns → click on the ITR → View Refund/Demand Status. Or track at tin-nsdl.com → Services → Refund Status → enter PAN and AY. (5) Timeline: after e-verification, ITD processes within 15-45 days on average (AY 2025-26 average: 28 days). Refund interest: if not credited within 90 days of filing, ITD pays 6% p.a. interest (Section 244A). (6) Refund reissue: if refund failed (wrong account number, IFSC changed): login to portal → Services → Refund Reissue → update bank account and request reissue.

Top ITR filing mistakes and how to avoid them: (1) Wrong ITR form: using ITR-1 when ITR-2 is required (any capital gains, income above Rs50L). Fix: choose ITR-2 when uncertain. (2) Not reviewing AIS: filing ITR without checking AIS misses bank interest, dividends, MF transactions the ITD already knows about. Fix: always review AIS before filing. (3) Not declaring all bank interest: FD interest from small cooperative banks or interest from savings account often missed. Fix: AIS captures most; cross-check with bank statement. (4) Wrong regime: defaulting to new regime without calculating old regime benefit from home loan + 80C. Fix: use regime calculator. (5) Missing deductions: not claiming 80D (parent’s health insurance), HRA (even without rent receipts for self-occupied), or home loan interest. Fix: go through each deduction section systematically. (6) Filing after July 31: late filing loses ability to carry forward capital losses and attracts Rs5,000 penalty. Fix: file by July 31 regardless of complexity. (7) Not e-verifying: filing but not e-verifying within 30 days invalidates the ITR. Fix: e-verify via Aadhaar OTP immediately after submission.