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In summary
Filing ITR is significantly smoother when you have assembled all documents before logging into the portal, scrambling for a bank statement or Form 16 midway through a return is how errors happen.
This page covers:
- What an ITR is and who needs to file
- How to choose the correct ITR form — ITR-1 through ITR-4
- FY 2024-25 key changes to note
- Complete document checklist: personal information, income proofs, tax deduction details, investment proofs, property and capital gains documents
- Documents specific to home loan claimants
- Common mistakes to avoid
What is an ITR and why must you file one?
An Income Tax Return (ITR) is the form through which taxpayers in India declare their income, deductions, and tax liability to the Income Tax Department. Filing is a legal obligation for anyone whose income exceeds the basic exemption limit — Rs. 2.5 lakh for individuals below 60 years — and for NRIs earning income in India. Beyond legal compliance, it is also necessary to claim refunds, carry forward losses to future years, and build a financial record that supports loan applications, visa processing, and other purposes.
Choosing the correct ITR form for AY 2026-27
| ITR form | Who should file it |
|---|---|
| ITR-1 (Sahaj) | Salaried individuals with total income up to Rs. 50 lakh and one house property |
| ITR-2 | Individuals with income from capital gains, or more than one house property |
| ITR-3 | Individuals with income from business or profession |
| ITR-4 (Sugam) | Individuals and HUFs opting for presumptive taxation |
Always verify the correct form for your profile on the Income Tax Department's official website — filing the wrong form is treated as a defective return.
Key changes applicable for FY 2024-25 (AY 2025-26 filing)
- Mandatory PAN-Aadhaar linkage for filing — returns are treated as invalid if PAN is not linked to Aadhaar
- Enhanced reporting requirements for capital gains and high-value transactions
- AIS (Annual Information Statement) now contains significantly more detailed transaction data — cross-check your return against AIS before submitting to avoid mismatches
Complete document checklist for ITR filing 2026
Personal information documents
- PAN card (linked to Aadhaar — mandatory)
- Aadhaar card
- Mobile number and e-mail linked to Aadhaar for OTP verification
Income proof documents
| Document | Who needs it | Purpose |
|---|---|---|
| Form 16 (Part A and Part B) | Salaried employees | Summary of salary paid and TDS deducted by employer |
| Bank account statements/ passbook | All taxpayers | Verify income, interest earned, and financial transactions |
| Other income proof | Freelancers, rental income earners | Freelancers, rental income earners |
Tax deduction details
| Document | Purpose |
|---|---|
| Form 26AS | Consolidated TDS statement — confirms all TDS deducted on your behalf by employers, banks, and other entities |
| Annual Information Statement (AIS) | Detailed record of income received, transactions, and taxes paid — cross-check your return against this before filing |
| TDS certificates (Form 16A) | For TDS deducted on income other than salary — from banks, professional fees, etc. |
Investment and deduction proof
| Deduction | |
|---|---|
| Section 80C — PPF, ELSS, NSC, LIC | Investment receipts, statements, premium payment proof |
| Section 80C — Home loan principal | Home loan statement showing principal repaid during the year |
| Section 80D — Health insurance | Premium payment receipts |
| Section 80E — Education loan interest | Education loan interest certificate from lender |
| Section 80G — Donations | Donation receipts with the charitable organisation's PAN |
| Section 80TTA/80TTB — Savings interest | Bank statements or interest certificates |
| HRA (House Rent Allowance) | Rent receipts from landlord; PAN of landlord if annual rent exceeds Rs. 1 lakh |
Capital gains documents
| Asset type | Document required |
|---|---|
| Equity shares or equity MF | Capital gains statement from broker or mutual fund house |
| Property sale | Sale deed; indexed cost of acquisition documents |
| Debt mutual funds | Capital gains statement from fund house |
| Gold or other assets | Purchase and sale receipts |
Property income documents
- Rental agreements for all let-out properties
- Property tax paid receipts
- Home loan interest certificate (for Section 24(b) deduction)
Home loan specific documents
If you are claiming home loan deductions, keep these ready:
| Document | Purpose |
|---|---|
| Home loan interest certificate | Section 24(b) — up to Rs. 2 lakh interest deduction for self-occupied property |
| Home loan statement | Shows principal repaid (for Section 80C) and outstanding balance |
| Completion/ possession certificate | Required if claiming interest deduction for under-construction property — deduction begins only from year of possession |
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Common mistakes when filing ITR
- Not checking AIS before filing. The AIS often contains data that taxpayers are unaware of — a dividend they forgot to declare, or interest credited on a dormant account. Mismatches between your return and AIS are the leading cause of notices in AY 2025-26.
- Filing ITR without pre-validating the bank account. Even if your filing is perfect, the refund cannot be credited to an unvalidated account. Pre-validate before filing, not after.
- Missing the deadline for ITR-V submission. If you filed but did not e-verify within 30 days, your return is treated as not filed. E-verify immediately after filing.
- Using the wrong ITR form. Filing ITR-1 when you had capital gains or a second property results in a defective return notice.
Having all documents ready before you start filing is the single most effective way to file accurately and avoid a notice. A clean ITR filing history is also a significant asset for home loan applications. Bajaj Finance offers home loans from 7.25% p.a.* with amounts up to Rs. 15 Crore* and tenures up to 32 years. Check your eligibility today.
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Frequently Asked Questions
Required documents
Tax records
Is Form 16 enough to file ITR, or do I need additional documents?
Form 16 is your starting point, but it is rarely sufficient on its own. You also need Form 26AS and AIS to verify TDS, bank statements to capture any additional income, and investment proofs if you are claiming deductions beyond what your employer has considered. Always cross-check Form 16 figures with Form 26AS before filing.
I have a home loan — what additional documents do I need for ITR filing?
You need the home loan interest certificate from your lender (for Section 24(b) deduction) and the annual loan statement showing principal repaid during the year (for Section 80C deduction). If the property was under construction, you also need the completion or possession certificate to establish from which year the interest deduction applies. Bajaj Housing Finance provides these documents through the customer portal — login to download them before filing.
What is the difference between Form 26AS and AIS?
Form 26AS shows only TDS deducted at source — tax credits against your PAN. The AIS is a broader document that includes all financial transactions reported against your PAN by banks, mutual fund houses, property registrars, and other entities. AIS is now the primary cross-reference tool the Income Tax Department uses to verify returns.
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