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ITR Filing Guide India 2026: Pick the Right Form + Avoid Common Mistakes

Which ITR form do you need — ITR-1, ITR-2, ITR-3, ITR-4? This guide walks through the decision tree based on income sources, capital gains, business income, and foreign assets — plus the 8 errors that trigger Income Tax notices for retail filers.

11 min readPublished 23 May 2026

Picking the wrong ITR form is the #1 reason salaried Indians get Income Tax notices. The form you file depends on your income sources, not your tax slab. This guide walks through the decision tree, deadlines, and the 8 errors that trigger automated mismatches with AIS/TIS systems.

The 4 most-common ITR forms

FormWho filesIncome types covered
ITR-1 (Sahaj)Salary income up to ₹50LSalary + one house property + other sources (interest, dividends) up to ₹50L total
ITR-2Salaried with capital gains / foreign income / multiple housesSalary + capital gains + multiple houses + foreign assets — NO business income
ITR-3Anyone with business or professional incomeBusiness income + F&O income + intraday trading + freelance / consulting + capital gains
ITR-4 (Sugam)Presumptive income (small business / freelance under 44AD/44ADA)Business income on presumptive basis, salary income, one property

The decision tree

  1. Do you have business / freelance / F&O / intraday income?
    • Yes, under 44AD/44ADA presumptive = ITR-4
    • Yes, regular books = ITR-3
    • No = continue
  2. Do you have capital gains (equity/MF/property/gold)?
    • Yes = ITR-2
    • No = continue
  3. Do you own more than one residential property?
    • Yes = ITR-2
    • No = continue
  4. Do you have foreign assets / foreign income?
    • Yes = ITR-2 (with Schedule FA disclosure)
    • No = continue
  5. Is your salary income under ₹50 lakh and you have no above conditions?
    • Yes = ITR-1 (Sahaj)
    • No = ITR-2

Capital gains — F&O / Intraday trap

Most retail traders think their F&O profit is capital gains. It's NOT — F&O income is BUSINESS income under the Income Tax Act. Same for intraday equity trading.

Tax audit (Section 44AB) is triggered if F&O turnover > ₹10 crore (post Budget 2020 amendment). Most retail F&O traders are nowhere near this threshold but must still file under ITR-3 with business income head.

Key deadlines (FY 2025-26 / AY 2026-27)

AIS / TIS / Form 26AS — the new world

Since 2021, the IT department maintains Annual Information Statement (AIS) and Tax Information Summary (TIS) with EVERY high-value transaction reported by banks, brokers, MFs, etc:

Filing ITR without matching AIS data triggers automated mismatch notices. Download AIS from income tax portal BEFORE filing, reconcile every line, then file.

The 8 most common ITR mistakes

1. Skipping equity LTCG below ₹1.25 lakh exemption

Even if gain is below exemption, you must DISCLOSE it. Skipping disclosure when AIS shows the gain = notice. Disclose + claim exemption = clean.

2. Mismatching FD interest with AIS

Bank reports FD interest in AIS. Many salaried earners only declare interest from primary bank, miss secondary bank or NRO/NRE accounts. AIS mismatch = notice.

3. Not reporting savings bank interest

Saving account interest is taxable beyond ₹10K (₹50K for senior under 80TTB). Most people miss this. Banks report to AIS regardless.

4. Choosing wrong regime

New regime is default. Old regime needs explicit selection in form. Many old-regime filers (with home loan + 80C + HRA) accidentally file under new regime and pay more tax.

5. Missing employer NPS (80CCD(2)) deduction

Employer NPS contribution should be deducted from gross salary. Many ITRs miss this — manual addition required in Schedule S.

6. Not declaring foreign equity / RSUs

US RSU vesting, ESOP exercise, foreign equity holdings must be disclosed in Schedule FA (Foreign Assets). Penalty for non-disclosure: ₹10 lakh.

7. Treating F&O as capital gains

Filing F&O in capital gains schedule of ITR-2 instead of business income in ITR-3 = wrong form selection. Triggers notice asking for clarification.

8. Missing house property loss adjustment

Home loan interest above ₹2 lakh creates “loss from house property” — set off against other income up to ₹2 lakh. Many salaried filers miss this and pay extra tax.

Filing methods

For salaried with only equity LTCG: DIY ITR-2 is fine. For F&O / business income: use a CA or specialised tax filer.

Refund timing

After filing + e-verification (within 30 days using Aadhaar OTP or net banking):

Use the Income Tax calculator to estimate tax + refund. Pair with the Capital Gains calculator for the schedule numbers.

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