How to File Your Income Tax Return (ITR) Online: A Complete Guide

An Income Tax Return is a form in which taxpayers declare their income, deductions, tax liability, and taxes already paid to the Income Tax Department for a given financial year. Filing an ITR is not just a legal obligation for those above the taxable income threshold; it also serves as valid proof of income and is often essential for loans, visa applications, and financial credibility.

Even if your income falls below the taxable limit, filing a return voluntarily can be beneficial. It creates a documented financial history and allows you to claim refunds on excess Tax Deducted at Source (TDS).

You are generally required to file an income tax return if any of the following apply:

If you are unsure whether you need to file, it is always safer to check with a qualified professional rather than risk a notice later.

Selecting the correct ITR form is a crucial first step. Using the wrong form can lead to a defective return notice. Here is a simplified overview of the most commonly used forms:

The exact eligibility conditions and income thresholds are notified by the department each year, so verify the latest criteria before selecting your form.

Keeping your paperwork ready makes the filing process smooth and error-free. Gather these before you begin:

Here is the general process to e-file your return through the official Income Tax e-filing portal.

Step 1: Register or log in. Visit the official Income Tax e-filing portal and log in using your PAN (which serves as your user ID) and password. First-time users must register first.

Step 2: Link PAN and Aadhaar. Ensure your PAN and Aadhaar are linked, as this is mandatory for filing. Your return may not be processed without it.

Step 3: Select the assessment year and filing mode. Navigate to the File Income Tax Return section, choose the correct assessment year, and select the appropriate filing status (individual, HUF, etc.).

Step 4: Choose the correct ITR form. Select the form that matches your income profile. The portal often suggests a suitable form based on your details, but confirm it independently.

Step 5: Review pre-filled data. The portal pre-fills much of your information, including salary, TDS, and interest income. Carefully verify every field against your documents and correct any discrepancies.

Step 6: Choose your tax regime. Decide between the old tax regime (with deductions and exemptions) and the new tax regime (with lower slab rates but fewer deductions). Compare both to see which results in lower tax for your situation.

Step 7: Declare deductions and compute tax. Enter eligible deductions and let the system compute your tax liability. Confirm whether you owe additional tax or are due a refund.

Step 8: Pay any outstanding tax. If tax is payable, clear it through the portal's payment options before submitting your return.

Step 9: Submit and e-verify. After submitting, you must e-verify your return, typically through Aadhaar OTP, net banking, or other available methods. Your return is not considered filed until it is verified.

The due date for filing depends on the taxpayer category. For most individual taxpayers who do not require an audit, the deadline generally falls in the middle of the year following the financial year, as notified by the department. Taxpayers requiring an audit have a later deadline.

Missing the due date can attract a late filing fee and interest on unpaid tax, and you may lose the ability to carry forward certain losses. If you miss the original deadline, you may still be able to file a belated return within the notified window, usually with a penalty. Always confirm the current year's exact dates on the official portal, as they can be extended by the government.

Is it mandatory to file an ITR if my income is below the taxable limit?

It is not mandatory in most cases, but filing voluntarily is highly recommended. It helps you claim TDS refunds, serves as proof of income for loans and visas, and builds a documented financial record.

What happens if I miss the ITR filing deadline?

You may still file a belated return within the window notified by the department, usually with a late fee and interest on any unpaid tax. However, missing the deadline can also mean losing the benefit of carrying forward certain losses.

Can I file my ITR without Form 16?

Yes. Form 16 makes filing easier, but it is not strictly mandatory. You can use your salary slips, bank statements, Form 26AS, and the AIS to compute and report your income accurately.

Which tax regime should I choose?

It depends on your income and the deductions you can claim. The old regime benefits those with significant deductions, while the new regime offers lower slab rates with fewer exemptions. Compare your tax under both before deciding.

Do I need to e-verify my return after filing?

Yes. Your return is not treated as filed until it is verified. You can e-verify instantly using Aadhaar OTP, net banking, or other available methods, ideally right after submission.

While filing an ITR online is straightforward for simple cases, matters get complicated quickly when you have capital gains, business income, multiple properties, or foreign assets. That is where expert help pays for itself.

At Regikart, our in-house team of Chartered Accountants and Company Secretaries handles your income tax filing end to end, ensuring accuracy, maximum eligible deductions, and full compliance. Not sure which regime suits you? Our old vs new tax regime comparison breaks it down. With offices in Kolkata, Delhi, Gurugram, and Pune and service across all of India, we make tax season stress-free for founders and individuals alike. Let our experts file on time, so you can focus on what matters most.