How to File ITR: Detailed Guide for Businesses, Proprietors, Salaried, and Freelancers

How to file income tax return online: If you're filing your ITR yourself for the first time, here's the short version: log in to the income tax e-filing portal at incometax.gov.in, pick the assessment year and the correct ITR form, let the portal pull in your pre-filled salary, TDS, and interest data, check it against your Form 16 and AIS, add anything missing, pay any tax due, submit the return, and then e-verify it within 30 days. Skip that last step and the return counts as never filed at all.

The rest of this guide walks through each part of that process in order, including which form applies to you, what documents to keep ready, and what to do after you've filed. I've handled ITR filings for close to a decade, so most of what's below comes from watching where people actually get stuck, not from the portal's own help text.

What is an income tax return, and why does it matter beyond just paying tax

An income tax return is a form you submit to the Income Tax Department reporting your income for a financial year, the deductions and exemptions you're claiming, and the tax you owe or the refund you're due. It isn't the same as paying tax. Tax is usually deducted through the year (TDS on salary, TDS on FD interest, advance tax), and the ITR is where you reconcile all of that against your actual total income.

Filing on time matters even if you owe nothing. A filed ITR is the document banks, embassies, and landlords ask for as proof of income. It's also the only way to claim a refund if excess tax was deducted, and the only way to carry forward a capital loss so you can set it off against gains in a future year.

Who actually needs to file an ITR this year

Under Section 139(1), you're required to file if your total income before deductions crosses the basic exemption limit for your chosen tax regime, even if deductions later bring your taxable income to zero. You're also required to file, regardless of income level, if during the year you deposited more than ₹1 crore in current accounts, spent more than ₹2 lakh on foreign travel, spent more than ₹1 lakh on electricity, hold a foreign asset or signing authority over a foreign account, or are a director in a company or hold unlisted equity shares.

Plenty of people who aren't legally required to file still choose to. A visa officer, a bank underwriting a home loan, or a landlord checking a new tenant's income will usually ask for two to three years of ITRs. If you're close to any of the thresholds above, filing voluntarily is simpler than explaining later why you didn't.

When you need to file, by taxpayer type

The due dates below are for FY 2025-26 (AY 2026-27). They shift slightly most years, so it's worth checking the portal's current notification before you file, but as things stand:

Miss your due date and you can still file a belated return up to 31 December 2026, but Section 234F applies a late fee: ₹1,000 if your total income is up to ₹5 lakh, ₹5,000 if it's above that, and nil if your income is below the basic exemption limit. If tax is still outstanding, interest under Section 234A runs at 1% a month on the unpaid amount until you pay it, on top of the late fee.

What documents you need before you start

Gathering these first saves you from stopping halfway through the form:

1. PAN and Aadhaar (linked, and with your Aadhaar-registered mobile number active, since you'll likely need it for e-verification)
2. Form 16 from your employer, if salaried
3. Form 26AS and the Annual Information Statement (AIS), both downloadable from the e-filing portal, showing TDS, TCS, and reported financial transactions
4. Bank account statements for the year, including all savings and current accounts
5. Interest certificates from banks or post offices for FDs and savings accounts
6. Capital gains statements from your broker or mutual fund platform, if you sold shares, mutual funds, or property
7. Home loan interest certificate, if you're claiming Section 24 deduction
8. Investment proofs for deductions you're claiming: PPF, ELSS, life insurance, health insurance premium, NPS, tuition fees, and so on
9. Rent receipts and landlord PAN, if you're claiming HRA and haven't already submitted these to your employer
10. Details of any foreign assets, foreign income, or directorship, if applicable

Cross-check every entry in your Form 26AS and AIS against your own bank statements before you file. Mismatches between what your AIS shows and what you report are one of the most common reasons returns get flagged for a notice later.

Which ITR form applies to you

Choosing the wrong form is the single most common filing mistake, and it usually happens because people default to the form they used last year without checking whether their income has changed.

Who can file ITR-1 (Sahaj)

ITR-1 is for resident individuals with income from salary or pension, up to two house properties (this was expanded from one house property for this assessment year), interest and other similar income, and long-term capital gains under Section 112A up to ₹1.25 lakh. Total income has to stay within ₹50 lakh.

You can't use ITR-1 if you have business or professional income, capital gains beyond the ITR-1 limit, any short-term capital gains, income from virtual digital assets like crypto, foreign assets or foreign income, a directorship in a company, unlisted equity shares, ESOP tax deferral from a recognised startup, or TDS deducted under Section 194N on large cash withdrawals. Any one of these pushes you to ITR-2 or ITR-3, even if the amount involved is small.

Who can file ITR-2

ITR-2 is for individuals and HUFs with capital gains of any kind, more than two house properties, foreign assets or foreign income, a company directorship, or unlisted equity shares, as long as they have no income from business or profession. This is the form most salaried people end up needing once they start investing in shares or mutual funds, since even a single redemption creates a capital gains entry that ITR-1 doesn't cover.

Who can file ITR-3

ITR-3 is for individuals and HUFs with income from a business or profession that isn't covered under the presumptive taxation scheme, or for presumptive-scheme taxpayers whose turnover has crossed the threshold for that scheme during the year. It's also the form for partners in a firm reporting their share of profit, and it requires maintaining and reporting books of account.

Who can file ITR-4 (Sugam)

ITR-4 is for individuals, HUFs, and firms (other than LLPs) with presumptive business or professional income under Sections 44AD, 44ADA, or 44AE, and total income up to ₹50 lakh. It allows up to two house properties, similar to ITR-1. If your presumptive business crossed the eligible turnover limit during the year, you'll need ITR-3 instead, even though you filed ITR-4 the previous year.

If you're still unsure after reading through these, the portal's own "Help me decide which ITR Form to file" tool asks a short set of questions and picks the form for you. It's a reasonable starting point, but it's still worth confirming against the criteria above, especially if your income sources changed during the year.

How to file your income tax return online, step by step

Step 1: register or log in to the e-filing portal

Go to incometax.gov.in. First-time filers click Register and create an account using PAN, Aadhaar, mobile number, and email. If you've filed before, click Login and sign in with your PAN (or Aadhaar), password, and the captcha shown.

Step 2: start a new filing and select the assessment year

From your dashboard, go to e-File, then Income Tax Returns, then File Income Tax Return. Select Assessment Year 2026-27 for income earned in FY 2025-26, and choose Online as the mode of filing. If you'd started a return earlier and didn't finish, the portal will offer to let you Resume Filing instead of starting fresh.

Step 3: select your status and confirm the correct ITR form

Choose whether you're filing as an individual, HUF, or firm, then select the ITR form based on the eligibility rules above. The portal shows the documents you'll need for that specific form before you proceed.

Step 4: review the pre-filled data against your own records

The portal auto-populates salary, TDS, interest income, and some capital gains data from Form 26AS, AIS, and your employer's TDS filings. Go through every field against your own Form 16, bank statements, and broker statements rather than assuming it's complete. Pre-filled data is a starting point, not a guarantee of accuracy, and errors in it are still your responsibility to correct.

Step 5: enter your income, deductions, and remaining details

Fill in any income not already pre-filled, then move to deductions: Section 80C investments, health insurance premium under 80D, home loan interest under Section 24, NPS contributions, and any others that apply. If you're choosing between the old and new tax regimes, this is where that choice gets made, and it's worth running the numbers both ways before deciding, since the two regimes treat deductions very differently.

Step 6: check the computed tax and pay anything due

The portal calculates your tax liability after accounting for TDS already deducted. If tax is still payable, click Pay Now to go to the e-Pay Tax service, complete the payment, and return to the filing flow. If there's no additional tax due, or you're owed a refund, you'll move straight to the preview stage.

Step 7: preview, validate, and submit

Preview the full return, resolve any errors the portal flags during validation (aim for zero errors before proceeding), and submit. Once submitted, the return sits in an unverified state until you complete the next step.

Step 8: e-verify your return within 30 days

This is where filing actually gets completed, and it's the step people skip most often.

How to e-verify your income tax return

You have 30 days from the date of filing to verify it. Miss that window and the return is treated as though it was never filed, no refund gets processed, and you'll need to file again, possibly with a late fee attached depending on the date.

The fastest option for most individual taxpayers is Aadhaar OTP: on the e-Verify Return page, select Aadhaar OTP, and a 6-digit code lands on the mobile number linked to your Aadhaar. Enter it and you're done in under two minutes. This only works if your PAN is linked to Aadhaar and that mobile number is active.

If Aadhaar OTP isn't available to you, you have several alternatives: net banking (log in through your bank's portal and look for the e-Filing or Tax option), an EVC generated through a pre-validated bank account or demat account, or a Digital Signature Certificate, which is mandatory for companies, LLPs, and taxpayers under specific audit provisions rather than optional for them.

If none of the electronic methods work, you can still verify offline. Download the ITR-V acknowledgement, print it, sign it in blue ink, and send it by ordinary or speed post to the Centralized Processing Centre, Income Tax Department, Bengaluru 560500, Karnataka, within the same 30-day window. CPC sends a confirmation once it's received and processed. Electronic verification is faster and confirms instantly, so it's worth trying that first even if you're more comfortable with paper.

How to check your ITR filing status

Log in to the portal and go to e-File, then Income Tax Returns, then View Filed Returns. You'll see the status for each assessment year: submitted and pending verification, successfully e-verified, under processing, processed, or a status flagging a defect that needs a response. If your return shows as processed, that's also where you'll find the intimation under Section 143(1), which confirms whether the department's computation matches yours.

What happens after you file your ITR

Once your return is e-verified, the Centralized Processing Centre processes it and issues an intimation under Section 143(1), usually comparing your figures against what the department has on record. If everything matches and a refund is due, it's credited directly to the bank account you've validated on the portal, typically within a few weeks of processing, though this varies. If the department's computation differs from yours, the intimation explains the difference, and you can respond or file a rectification if you believe the department's figure is wrong.

How to download your ITR acknowledgement

Go to e-File, then Income Tax Returns, then View Filed Returns, select the relevant assessment year, and click Download Receipt or Download ITR-V. This acknowledgement is what most banks and visa offices ask for as proof of filing, alongside the return itself.

What to do if you make a mistake in your ITR

If you spot an error after submitting but before the due date, you can file a revised return under Section 139(5) any number of times before the deadline, and the latest version replaces the earlier one entirely. Under the current rules, revised returns can be filed up to 31 March of the year following the assessment year, though a late fee applies if you file the revision after 31 December.

If you've already missed even the revised return window and later realise you underreported income, an updated return (ITR-U) is available for up to four years from the end of the relevant assessment year, though it comes with additional tax and cannot be used to reduce your reported income or increase a refund.

Common mistakes to avoid when filing ITR online

• Choosing last year's ITR form out of habit instead of rechecking eligibility against this year's income
• Trusting pre-filled data without cross-checking it against Form 26AS, AIS, and your own bank records
• Forgetting to report interest income from savings accounts and fixed deposits because no TDS was deducted on it
• Missing a small capital gains transaction, like a mutual fund redemption, which disqualifies ITR-1 even if the amount is minor
• Submitting the return and assuming filing is complete without e-verifying it within 30 days
• Picking a tax regime without actually comparing the tax payable under both
• Not keeping supporting documents for deductions claimed, in case of a later query from the department

Frequently asked questions about filing ITR online

Can I file my income tax return myself? Yes. If your income sources are straightforward, salary, one or two house properties, bank interest, and modest capital gains, the e-filing portal's guided flow with pre-filled data is built for self-filing. Complex situations involving business income, foreign assets, or multiple capital gains transactions across the year are where hiring a professional starts to make more sense.

Can I file ITR online without a CA? Yes, filing itself doesn't require a Chartered Accountant. A CA is legally required only in specific situations, such as when a tax audit applies under Section 44AB. For most salaried and small-business filers, self-filing through the portal is entirely valid.

How do I file ITR for the first time? Register on the e-filing portal using your PAN, Aadhaar, mobile number, and email, then follow the same process as any other filer: select the assessment year, choose your ITR form, review pre-filled data, enter remaining income and deductions, submit, and e-verify within 30 days.

How do I file ITR online for a salaried person? Most salaried individuals with straightforward income use ITR-1, provided their total income is within ₹50 lakh and they don't have disqualifying items like capital gains beyond the ITR-1 limit or foreign assets. Your Form 16 will match closely with what the portal pre-fills, so the main work is checking deductions and any income your employer wouldn't know about, like savings account interest.

Can I file ITR without Form 16? Yes. Form 16 makes the process faster since it summarises your salary and TDS, but you can reconstruct the same information from your salary slips, Form 26AS, and AIS if your employer hasn't issued one, which sometimes happens if you changed jobs mid-year or worked as a contractor initially misclassified as an employee.

What documents are required for ITR filing? At minimum: PAN, Aadhaar, Form 16 if salaried, Form 26AS and AIS, bank statements, and proof of any deductions you're claiming. If you have capital gains, add your broker or mutual fund statements. The full list is in the documents section above.

How do I know which ITR form to choose? Match your income sources against the eligibility criteria for ITR-1 through ITR-4 above. As a shortcut: salary only, and simple income, usually ITR-1; add capital gains or foreign assets, ITR-2; add business income, ITR-3 or ITR-4 depending on whether you're under the presumptive scheme.

How long does it take to file an ITR online? For a salaried filer with pre-filled data and documents already gathered, actually filling in and submitting the return typically takes 20 to 40 minutes. The time that actually varies is how long it takes to gather and cross-check documents beforehand, which is worth doing properly rather than rushing.

What happens if I do not e-verify my ITR? The return is treated as though it was never filed. No refund is processed, and you'll need to file it again and complete verification within a fresh 30-day window, which may attach a late fee depending on the date you refile.

Can I revise my ITR after filing? Yes, under Section 139(5), any number of times before the revised return deadline. Each revision replaces the previous version of the return in full, so there's no need to explain what changed within the form itself.

How can I check my ITR refund status? Log in to the e-filing portal, go to e-File, then Income Tax Returns, then View Filed Returns, and check the status against the relevant assessment year. Refund status also shows separately once your return has been processed and a refund has been determined.