Tax Guide AY 2026-27 · 6 min read

How to File ITR-1 Online — A Complete Beginner's Guide (AY 2026-27)

You've got Form 16 open in one tab, the income tax portal login screen in another, and a July 31 deadline that keeps feeling further away than it is.

Filing ITR-1 isn't actually complicated — most of the confusion comes from nobody explaining what each screen is asking for, or what's different in this year's version. This guide fixes both.

The good news: if you're salaried with a straightforward return, filing ITR-1 is usually a 20–30 minute process once you know what each screen is asking.

🎯 Is This Guide For You?

This guide is for you if:

This guide is NOT for:

📋 Why This Year Is Different

A few things changed in the ITR-1 filing process this year, and one old habit just got more expensive. If you've filed before, don't assume this year's form works exactly like last year's — two of these changes affect who can even use it, and one affects everyone who files late.

What's new for AY 2026-27What it means for you
Two house properties allowedA self-occupied home plus a rented-out flat no longer forces you into the more complex ITR-2.
Small capital gains allowedLTCG under Section 112A up to ₹1,25,000 (listed shares or equity mutual funds) can now stay inside ITR-1, if you have no losses to carry forward.
Aadhaar number is mandatoryThe old Aadhaar Enrolment ID no longer works — you need your actual 12-digit Aadhaar number.
Deductions need exact codes80C, 80D, and similar deductions are picked from a dropdown with the specific clause, not typed as free text.
The One That Catches People Out
File after July 31 and the choice disappears. Belated returns are automatically taxed under the new regime — even if the old regime would have worked out cheaper for you this year.

🧭 Step-by-Step: Filing ITR-1 on the Portal

Before You Start
Keep these ready: Form 16, your bank interest certificates, access to AIS and Form 26AS on the portal, a pre-validated bank account for your refund, and a mobile number linked to your Aadhaar for OTP verification.
1

Log in

Go to the Income Tax Portal (incometax.gov.in) and log in with your PAN as the user ID and your portal password.

Watch for: Forgotten your password? Use Aadhaar OTP login instead of the email reset flow — it's faster and skips the wait.

2

Go to e-File

Click e-File → Income Tax Returns → File Income Tax Return. Select Assessment Year 2026-27 and Online as the mode.

Watch for: It's easy to pick last year's assessment year out of habit. This return covers income earned in FY 2025-26, filed under AY 2026-27 — double-check before continuing.

3

Select ITR-1

Choose "Individual" as your status, then let the portal confirm your eligibility before selecting ITR-1 (Sahaj).

Watch for: You may now qualify for ITR-1 even with two house properties or a small capital gain — don't assume you need ITR-2 just because that used to be the rule.

4

Choose your regime

Confirm or change your tax regime for this return. The new regime is pre-selected by default.

Watch for: This single choice affects your final tax more than anything else on the form. Run both regimes through an actual calculator using this year's numbers — don't rely on what worked last year.

Compare both regimes on your actual numbers in under a minute at ITRMate.com — free, no signup needed for the calculator.

Not sure which regime fits you? Read our Old vs New Tax Regime comparison first.

5

Enter income details

Salary, house property, and other income are mostly pre-filled from your Form 16 and AIS.

Watch for: Pre-filled doesn't mean correct. Savings account interest and small fixed deposit interest are the entries most often missing or mismatched.

6

Claim deductions

Under the old regime, enter 80C, 80D, HRA, and other eligible deductions, selecting the specific section from the dropdown.

Watch for: Your contribution amounts and eligible investments may have changed since last year — re-check them rather than reusing last year's figures.

7

Verify TDS

Cross-check the TDS the return shows against your Form 16 and Form 26AS or AIS.

Watch for: A small mismatch here is one of the most common reasons refunds get held up for months — worth the extra two minutes.

8

Submit and e-verify

Quick check before you click submit:

  • PAN and personal details are correct
  • Bank account is pre-validated and selected for refund credit
  • AIS and Form 26AS have been reviewed against your Form 16
  • Tax regime is the one you actually meant to pick

Preview the return, submit it, then e-verify immediately using Aadhaar OTP or net banking.

Watch for: You have 30 days to e-verify after submitting. Miss that window and the return is treated as though it was never filed — the whole submission counts for nothing.

⚠️ Common Mistakes First-Time Filers Make

1
Not e-verifying after submission — Your return isn't legally filed until it's verified. Do it the same day — don't leave the portal until you see the confirmation.
2
Choosing the regime out of habit — Compare both regimes with a calculator every year. Which one wins can change as your income or deductions change, even if you didn't switch jobs.
3
Ignoring an unfamiliar entry in AIS — Usually a joint account, an old FD, or interest you forgot about — confirm it before filing rather than assuming it's wrong.
4
Assuming last year's form limits apply — You may now be eligible for ITR-1 with two properties or a small capital gain where you weren't before. Check this year's rules, not last year's.
5
Filing in the last few days — The portal slows down under heavy traffic close to the deadline. Filing early leaves you time to fix anything that comes up.

🚀 Skip the Manual Comparison

Before you file on the portal, run your Form 16 through ITRMate once. In under a minute, you'll know which regime saves more, get a downloadable Tax Calculation Sheet, and a personalised filing guide with your own numbers already filled in.

Try ITRMate Free →
Upload Form 16 Instant regime comparison Free Tax Calculation Sheet No signup required

❓ Frequently Asked Questions

Do I need to file if my employer already deducted TDS?
Yes. TDS is a payment toward your final tax, not a substitute for filing. Filing is what reconciles the two and confirms whether you're owed a refund or owe more.
Can I switch between old and new regime next year?
If your income is salary-only, with no business income, yes — you choose the regime fresh each year when you file, as long as you file on time.
What if I make a mistake after submitting?
File a revised return before March 31, 2027. Corrections are normal and don't attract a penalty on their own, as long as your original return was filed on time.
What happens if I miss the July 31 deadline?
You can still file a belated return until December 31, 2026, but you'll pay a late fee under Section 234F (₹1,000 or ₹5,000, depending on your income), face 1% monthly interest on any unpaid tax, and lose the option to choose the old regime for that year.
Do I need the CA Review service to use ITRMate?
No. The tax calculator and this guide are free to use on their own. The review is an optional add-on for anyone who wants a professional check before submitting.
⚠️ Disclaimer: This article is for general information only and isn't professional tax advice. Individual tax situations vary — consult a qualified Chartered Accountant before making filing decisions specific to your case.
← Back to All Tax Guides