ITR Filing for Beginners: What to Understand Before You Start

Most first-time filers open the income tax portal expecting a form. What actually trips people up isn't the form itself, it's a handful of concepts nobody explains upfront. Once these click, the rest is mostly data entry.

Financial year and assessment year aren't the same thing

The financial year (FY) is the year you earned the income, April to March. The assessment year (AY) is the year right after, when that income gets assessed and taxed.

Every form and portal screen uses this pairing, so getting it backwards is the single most common early confusion, and it's worth memorizing the current pair before you do anything else.

The two tax regimes aren't optional trivia

India currently runs two parallel tax structures: the new regime (the default one, with lower rates but very few deductions) and the old regime (higher rates, but allows deductions like 80C, HRA, and home loan interest). You actively choose one when filing.

For FY 2025-26, the new regime's basic exemption is ₹4 lakh, and the Section 87A rebate makes taxable income up to ₹12 lakh effectively tax-free (₹12.75 lakh for salaried individuals once the ₹75,000 standard deduction is applied). The old regime's exemption is lower, but stacking 80C, 80D, HRA, and home loan interest deductions can bring a much higher gross income down to a similarly low taxable figure.

Picking wrong doesn't just mean paying slightly more, it can mean missing deductions you'd already invested in expecting to claim. If you've been putting money into ELSS or PPF for the tax benefit, run both calculations before assuming the new regime's lower rates automatically win.

Form 16 is your starting point, not your only source

If you're salaried, your employer issues Form 16 after the financial year ends, summarizing your salary, TDS deducted, and (under the old regime) declared deductions. It's the natural starting point for filling your return. But it isn't complete. Interest from savings accounts and fixed deposits, freelance income, capital gains from mutual funds or stocks, none of that shows up on Form 16, and you're still required to report it.

Form 26AS and AIS show what the department already knows

Form 26AS is a consolidated statement of tax deducted or collected against your PAN. The Annual Information Statement (AIS) goes further, showing high-value transactions, interest, dividends, and mutual fund activity that's been reported to the department by banks and other institutions. Before filing, checking both is worth the ten minutes: if there's a mismatch between what you're about to declare and what these show, it's the kind of thing that gets your return flagged for a closer look later.

Choosing the right ITR form matters more than people expect

Filing under the wrong form is a common reason returns get treated as defective, requiring a correction and resubmission within a set window.

Filing isn't the last step, verification is

Submitting the form online isn't the end of the process. The return has to be verified, either electronically through Aadhaar OTP, net banking, or a few other methods, or by physically mailing a signed form to the department within the required window. An unverified return is treated as if it was never filed at all, which surprises a lot of first-timers who assume "submitted" means "done."

What to actually do with all this

Before you open the portal: gather Form 16 (if salaried), bank interest certificates, any capital gains statements, and check Form 26AS and AIS for anything you might have missed. Decide which regime you're filing under by running the numbers both ways if you have old-regime deductions to claim. Then pick the correct ITR form based on your income types from the table above. That preparation is most of the actual work, the form itself moves fast once you have it. Once you've got the basics down, the step-by-step filing walkthrough picks up exactly where this leaves off. For the full map of every filing-related article on the site, see the complete tax filing guide.

This article is educational and not personalised financial advice. Rules, forms, and thresholds referenced here reflect the position as of AY 2026-27 per the Income Tax Department; always confirm current details there before filing.