Who is required to file an income tax return in India?

You must file a return if your total income before deductions crosses the basic exemption limit for the year. You also have to file, regardless of income, in certain cases such as holding foreign assets, depositing large amounts in bank accounts, spending heavily on foreign travel or electricity, or if tax was deducted and you want a refund. Many people file even when not required, because a return is proof of income for loans and visas. Confirm the current thresholds on the income tax portal before you decide.

Which ITR form should I use?

The form depends on your sources of income. A salaried person with one house and interest income usually files ITR-1. Someone with capital gains or more than one house uses ITR-2. A person with business or professional income uses ITR-3, and small businesses or professionals under presumptive taxation use ITR-4. Companies and firms have their own forms. Picking the wrong form can make your return defective, so match the form to your income before you start.

What documents do I need to file my ITR?

Keep your PAN, Aadhaar, bank account details, Form 16 from your employer, and your Form 26AS and Annual Information Statement, which show the tax already deducted against your PAN. Add interest certificates from banks, proof of deductions you claim such as insurance or provident fund, and capital gains statements if you sold shares or property. You do not attach these to the return, but you need the numbers to fill it and the papers if the department later asks.

Can I file my income tax return myself online?

Yes. The income tax portal lets you file directly without an agent. For a simple salaried return, much of the form comes pre-filled from your PAN records, so you check the figures, add anything missing, confirm your tax, and submit. More complex returns with business income or capital gains take longer and some people use a tax professional, but the portal itself is open to every taxpayer and filing there is free.

What happens if I miss the ITR filing due date?

You can still file a belated return up to the last date allowed for the year, but a late fee applies and it rises with your income. You also lose the right to carry forward certain losses, and interest runs on any unpaid tax. Filing late is far better than not filing at all, because a missed return can attract notices and heavier consequences. Check the current late-fee amounts and the final belated-return date on the income tax portal.

ITR Filing: How to File Your Income Tax Return in India (2026)

Filing an income tax return is one of those tasks that feels heavier than it is. For most salaried people the return is short, much of it is filled in for you, and the whole thing can be done from a phone or a laptop in under an hour once your papers are in front of you. This guide walks through who has to file, how to choose the right ITR form, the step-by-step online process on the income tax portal, the documents you should gather first, the due dates worth marking, and what happens if you miss them. Where figures and dates change from one year to the next, treat the numbers here as a guide and confirm the latest position on the income tax portal before you file.

Who has to file an ITR

The first question is whether you are required to file at all. You must file a return if your total income for the year, before deductions, crosses the basic exemption limit that applies to you. Beyond that income test, the law lists several situations where filing is compulsory whatever your income:

Tax was deducted: if TDS or TCS was taken against your PAN and you want any part of it back, you file a return to claim the refund.
Foreign assets or income: holding assets outside India, or earning income abroad, makes filing mandatory regardless of the amount.
Large deposits or spends: depositing high sums in bank accounts, spending large amounts on foreign travel, or paying heavy electricity bills can trigger a filing requirement.
Business turnover: crossing specified turnover or gross-receipt thresholds in business or a profession brings you into the filing net.

Plenty of people file even when they are below the limit, because a filed return is the cleanest proof of income you can show a bank for a loan or an embassy for a visa. If in doubt, filing is the safer choice, and the current thresholds are published on the income tax portal each year.

Old regime or new regime

Before you fill anything, decide which tax regime you are filing under, because it changes your tax and the deductions you can claim. The new regime offers lower slab rates but removes most common deductions, while the old regime keeps the deductions but charges higher rates. Which one saves you money depends on how much you actually claim in deductions such as provident fund, insurance, home loan interest and rent. Work out your tax both ways before you commit, and read our explainer on the income tax slabs to see how the rates compare. The portal lets you choose the regime while filing, and for salaried filers the choice can usually be made afresh each year.

Which ITR form to use

The income tax department publishes several return forms, and using the wrong one can make your return defective. The form you need depends on your sources of income, not on how much you earn. Here is the common mapping for individuals:

If you are salaried with a single house and some bank interest, ITR-1 almost always fits. The moment you add capital gains from shares or property, or a second house, you move to ITR-2. Run a business or a profession and you are into ITR-3, or ITR-4 if you use the presumptive scheme. Match the form to your income before you start, because switching forms halfway means re-entering your data.

Documents to gather first

Filing goes quickly when your papers are ready. You do not attach these to the return, but you need the numbers from them, and you must keep them safe in case the department asks later. Pull these together before you log in:

PAN and Aadhaar: both are needed, and they should be linked for filing to go through.
Form 16: your employer's certificate of salary paid and tax deducted. Our guide to Form 16 explains how to read it.
Form 26AS and the Annual Information Statement: these show the tax already credited against your PAN and a summary of your reported transactions, so your return matches the department's records.
Bank and interest details: account numbers for the refund, and interest certificates from banks and post offices.
Proof of deductions: receipts for insurance, provident fund, tuition, donations and any other deduction you plan to claim.
Capital gains statements: if you sold shares, mutual funds or property, the statement showing purchase and sale values.

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The step-by-step online process

The income tax portal is where individual returns are filed, and the flow is the same each year even as the screens are refreshed. In broad terms, filing runs like this:

Log in: sign in to the income tax portal with your PAN as the user ID, and complete the one-time verification if prompted.
Open the filing section: choose to file a return for the relevant assessment year and select whether you are filing online or through a downloaded utility.
Pick the form and regime: select the ITR form that matches your income and confirm your tax regime.
Check the pre-filled data: your personal details, salary, and the tax already deducted are pulled in from your PAN records. Compare them against Form 16 and Form 26AS and correct anything that does not match.
Add what is missing: enter interest income, capital gains, other income and the deductions you are claiming, so the return reflects your full position.
Confirm the tax or refund: the portal computes your tax. If more is due, pay it before you submit. If tax was over-deducted, the difference becomes your refund.
Submit and verify: file the return, then verify it. Verification is the step that actually completes filing, most commonly done through an Aadhaar-linked one-time password.

That last step matters more than people realise. A return that is submitted but never verified is treated as not filed, so complete the verification the same day and keep the acknowledgement.

Verify your return, or it does not count

Because verification is where so many filings quietly fail, it is worth its own note. Once you submit, you have a limited window to verify, and the quickest route is an Aadhaar one-time password sent to your registered mobile. There are other methods, such as verification through your bank or a physical signed form sent by post, but the electronic route finishes in seconds. Until you verify, the department does not begin processing your return, which means any refund does not move either. Make verification part of the same sitting as filing, rather than a task you promise to come back to.

Due dates and the cost of missing them

Every assessment year has a filing due date, and for most individuals who are not subject to audit it falls in the middle of the year following the one you earned in. Businesses that need an audit have a later date. Filing on time keeps the process simple and protects certain rights. Missing the date has real costs:

Late fee: a fee applies when you file after the due date, and it is higher for larger incomes.
Interest on unpaid tax: if you owe tax, interest runs from the original due date until you pay.
Lost loss carry-forward: file late and you may lose the right to carry certain losses forward to set against future income.
Belated window: you can still file a belated return up to the final date allowed for the year, after which the door largely closes.

The exact due dates, the late-fee amounts and the belated-return deadline are set each year, so confirm them on the income tax portal rather than relying on last year's dates.

Common mistakes to avoid

Most filing problems come from a handful of avoidable slips. Watch for these before you submit:

Ignoring Form 26AS: if your return does not match the tax credited against your PAN, it can trigger a mismatch notice. Reconcile first.
Forgetting small income: savings interest, a matured deposit or a bit of freelance income still counts. Leaving it out is what turns a quiet return into a queried one.
Wrong bank details: a refund goes to the account you name, so an old or mistyped account number delays or fails the refund.
Skipping verification: as above, an unverified return is not a filed return.

Keeping the paperwork behind your return

Filing is not the end of your responsibility. The department can ask you to support a return for years after you file, so keep the documents behind every figure you entered. For a salaried person that means the Form 16, bank interest certificates and proof of deductions. For a business it means invoices, expense records and the books that back your declared income. If you run a business, keeping clean records through the year is what makes filing quick rather than a scramble, because the numbers are already sitting in your billing and accounts rather than scattered across notebooks. That is a large part of why keeping your sales and expenses in one place matters well before the return is due, a point our features overview covers in more detail.

The bottom line

ITR filing rewards preparation. Work out whether you must file, choose the regime that costs you less, pick the form that matches your income, gather your PAN, Form 16, Form 26AS and proof of deductions, then file and verify on the income tax portal in one sitting. Confirm the current thresholds and dates on the portal, because they shift year to year. If clean records are what make filing painless, keeping your billing and expenses in one place all year is the real fix. IndiaCRM keeps your GST invoices, sales and expenses together in one free app, so the numbers you need at filing time are already there. Get the mobile app, see GST billing software, or read our TDS guide to understand the tax that shows up in your return.