Essential Documents for Filing Income Tax Returns

Every tax season starts the same way. You log into the income tax portal, feeling confident, and then the questions begin. Where is last year’s Form 16? Do you need Form 26AS or the AIS? What about that LIC premium receipt from March? Gathering the right documents before you start filing an Income Tax Return (ITR) is what separates a five-minute filing experience from a frustrating scramble. Here’s a complete rundown of what you need and why each document matters.

Why documents matter before you start filing 🔗

An ITR is essentially a declaration of your income, deductions, and tax liability for a financial year. The income tax portal pre-fills a lot of this information automatically from your employer’s TDS filings, bank records, and mutual fund data, but pre-filled data is a starting point, not the final word. You remain responsible for checking that every figure is accurate before you submit. Missing or mismatched documents are one of the most common reasons taxpayers receive notices under Section 143(1)(a) for discrepancies between what they’ve declared and what the department already has on record. Having your paperwork ready before you begin isn’t just about convenience. It directly reduces the chances of errors, delayed refunds, or follow-up queries from the tax department.

Identity and basic documents 🔗

PAN card 🔗

Your Permanent Account Number (PAN) is the primary identifier used throughout the filing process. Every entry on your return, from income to deductions, is linked to this ten-digit number, so it’s the very first thing to keep handy.

Aadhaar card 🔗

Aadhaar is required for verification and e-authentication during filing. It’s important to ensure your PAN and Aadhaar are linked, since non-linking can create complications when you try to file or verify your return.

Bank account details 🔗

Keep your bank account number, IFSC code, and branch details ready for every active account you held during the year. Correct bank information is what ensures your refund, if any, reaches you without delay, and current ITR forms require you to disclose details of all your active accounts, not just the one you plan to use for the refund.

Income documents for salaried individuals 🔗

Form 16 🔗

If you’re a salaried employee, Form 16 is arguably the single most important document you’ll need. Employers are generally required to issue it by 15 June following the end of the financial year. It comes in two parts: Part A shows the tax deducted at source (TDS) and deposited with the government, while Part B gives a full breakup of your gross salary, exemptions such as HRA and LTA, and the deductions claimed under Chapter VI-A. If you switched jobs during the year, remember to collect a Form 16 from each employer you worked for.

Salary slips 🔗

Monthly salary slips help you cross-verify the figures mentioned in Form 16, especially if your pay included bonuses, variable components, or reimbursements. They’re particularly useful for checking allowances like HRA that may not always be captured cleanly in Form 16.

Rent agreement and rent receipts 🔗

If you’re claiming House Rent Allowance (HRA) exemption, keep your rent agreement and rent receipts ready. If your landlord’s PAN is required (applicable when annual rent exceeds a specified threshold), have that on hand too.

Tax credit statements: Form 26AS, AIS, and TIS 🔗

Beyond Form 16, three portal-generated statements are essential for accurate filing. Form 26AS is your consolidated tax credit statement, showing TDS and TCS details linked to your PAN. From AY 2023-24 onwards, the tax department has clarified that Form 26AS on the TRACES portal reflects only TDS and TCS-related information, while broader financial details are captured separately.

The Annual Information Statement (AIS) and Taxpayer Information Summary (TIS) go a step further. The AIS was introduced to give taxpayers a single, comprehensive view of nearly all financial transactions linked to their PAN, including interest, dividend income, securities transactions, mutual fund activity, and foreign remittances. It also lets you submit feedback if any entry looks incorrect, which is useful if a bank or employer has reported something inaccurately. Reviewing Form 26AS and AIS together before filing helps you catch reporting gaps early rather than after you’ve already submitted your return.

TDS certificates beyond salary 🔗

If you’ve earned income from sources other than salary, additional TDS certificates apply. Form 16A covers TDS deducted on income like bank interest or professional fees, Form 16B applies to TDS on the sale of immovable property, and Form 16C applies to TDS on rent payments. Cross-check each of these against your Form 26AS to make sure the credit has actually been reported against your PAN.

Investment proofs for deductions under Section 80C 🔗

If you’re filing under the old tax regime, Section 80C is where most taxpayers claim the bulk of their deductions, up to a combined limit of ₹1.5 lakh across all eligible instruments and expenses. Keep proof of the following investments ready:

Make sure every investment is in your own name and was made before the end of the financial year. Under current ITR forms, you’re required to mention policy numbers, account numbers, or receipt references for each 80C claim, so keeping these documents organised saves time later.

NPS and additional retirement deductions 🔗

Contributions to the National Pension System (NPS) offer tax benefits beyond the regular 80C limit. Under Section 80CCD(1B), you can claim an additional deduction of up to ₹50,000 for NPS contributions, over and above the ₹1.5 lakh ceiling under 80C. This takes your potential deduction to ₹2 lakh in total. Keep your NPS contribution statement or Tier-I account transaction summary ready, since this benefit is available only under the old tax regime and not the new one.

Health insurance and Section 80D 🔗

Health insurance premiums are deductible under Section 80D, separately from the 80C limit. Under the old regime, you can generally claim up to ₹25,000 for premiums paid for yourself, your spouse, and dependent children, with an additional ₹25,000 available for parents below 60, or ₹50,000 if they are senior citizens. Keep your health insurance premium receipts and, if applicable, receipts for preventive health check-ups, which are also eligible within this limit.

Other documents depending on your income sources 🔗

Not everyone’s tax situation looks the same, so a few additional documents may apply to you:

• Capital gains statements: If you sold shares, mutual funds, or property, get a capital gains statement from your broker, fund house, or the buyer’s records.
• Home loan interest certificate: If you’re repaying a home loan, your lender’s interest certificate is needed to claim deductions under Section 24(b).
• Books of accounts: Freelancers and business owners need income and expense records, invoices, and bank statements related to their business.
• NRE/NRO account details: Non-resident taxpayers need details of these accounts along with a residency certificate, where applicable.

Does the paperwork change between the old and new tax regime? 🔗

The new tax regime is now the default option for most taxpayers, and it strips away most deductions, including 80C, 80D, and HRA exemptions. If you plan to stay in the new regime, you still need your identity documents, Form 16, Form 26AS, and AIS, but you can skip collecting investment and insurance proofs since those deductions generally aren’t available. If you want to claim 80C, 80D, or similar deductions, you’ll need to actively opt for the old regime while filing, which makes all the investment documentation above relevant again. Comparing both regimes based on your actual income and eligible deductions is worth doing before you decide.

A quick document checklist 🔗

Building this checklist at the start of each financial year, rather than scrambling for it in July, makes the entire filing process faster and far less stressful. It also gives you time to spot and correct discrepancies in your AIS or Form 26AS well before the deadline.

What do you think? Do you keep your tax documents organised through the year, or do you find yourself gathering everything at the last minute? And if you had to choose between the simplicity of the new tax regime and the deductions available under the old one, which would you lean towards for your own income situation?

References

1. https://www.incometax.gov.in/iec/foportal/ais-faq
2. https://www.business-standard.com/amp/article/economy-policy/get-info-on-interest-and-dividend-income-investments-made-on-i-t-portal-121110101389_1.html
3. https://cleartax.in/s/80c-80-deductions
4. https://www.hdfcpension.com/blog/new-tax-regime/
5. https://www.kotaklife.com/insurance-guide/savingstax/income-tax-deductions-list
6. https://www.goodreturns.in/personal-finance/income-tax-returns-itr-filing-2026-portal-process-document-checklist-deadline-dates-014-1512075.html