Income Tax Filing in India: Complete Guide
Filing your Income Tax Return (ITR) correctly and on time is one of the most important financial obligations for every earning individual in India. This comprehensive guide walks you through everything you need to know — from choosing the right form to verifying your return after filing.
Key Takeaways
- Every person earning above the basic exemption limit must file an ITR by 31 July.
- Even below the limit, filing is strongly advisable for the paper trail it creates.
- Choose your ITR form based on your income sources — using the wrong form leads to a defective return notice.
- File online on incometax.gov.in — it is free, fast, and pre-filled with data from your employer and bank.
Who Must File an Income Tax Return?
Filing an ITR is mandatory if any of the following apply to you:
- Your gross total income exceeds the basic exemption limit (₹2.5 lakh under old regime; ₹3 lakh under new regime for individuals below 60; ₹3 lakh for senior citizens 60–80; ₹5 lakh for super senior citizens above 80).
- You have deposited more than ₹1 crore in bank accounts during the year.
- You have incurred electricity expenses above ₹1 lakh during the year.
- You have spent above ₹2 lakh on foreign travel.
- You are a company or firm, regardless of profit or loss.
- You want to claim a refund of excess TDS deducted.
- You want to carry forward a loss (capital losses, business losses) to future years.
- You hold assets or have financial interest in an entity outside India.
Even if none of the above apply, filing voluntarily is strongly recommended. It creates an income record that banks, embassies and government agencies frequently require.
ITR Forms at a Glance
Choosing the correct form is the first and most critical step. Using the wrong form results in a defective return notice.
| Form | Who Should Use It |
|---|---|
| ITR-1 (Sahaj) | Resident individual: salary/pension, one house property (no loss), other sources. Total income ≤ ₹50 lakh. Not a director or holder of unlisted shares. |
| ITR-2 | Individual/HUF: capital gains, more than one house property, foreign income or assets, NRI. No business income. |
| ITR-3 | Individual/HUF: income from business or profession (non-presumptive). |
| ITR-4 (Sugam) | Individual/HUF/Firm: presumptive income under Section 44AD (business, ≤₹3 Cr), 44ADA (professionals, ≤₹75 lakh), 44AE (transport). Total income ≤ ₹50 lakh. |
| ITR-5 | LLP, AOP, BOI, AJP. |
| ITR-6 | Companies (other than those claiming exemption under Section 11). |
| ITR-7 | Trusts, political parties, scientific research institutions filing under Section 139(4A)–(4F). |
Most salaried individuals will use ITR-1 or ITR-2. If you have capital gains from mutual funds or stocks, you need ITR-2, not ITR-1.
Key Due Dates for FY 2024-25 (AY 2025-26)
| Taxpayer | Due Date |
|---|---|
| Individuals, HUFs (not subject to audit) | 31 July 2025 |
| Business/profession subject to audit | 31 October 2025 |
| Partners in a firm subject to audit | 31 October 2025 |
| Belated return | 31 December 2025 |
| Updated return (ITR-U) | Within 24 months of end of AY |
Late filing fees (Section 234F):
- Income ≤ ₹5 lakh: ₹1,000
- Income > ₹5 lakh: ₹5,000
Understanding Tax Slabs for FY 2024-25
New Tax Regime (Default from FY 2024-25)
Budget 2024 made the new regime the default and revised the slabs:
| Income Slab | Tax Rate |
|---|---|
| Up to ₹3,00,000 | Nil |
| ₹3,00,001 – ₹7,00,000 | 5% |
| ₹7,00,001 – ₹10,00,000 | 10% |
| ₹10,00,001 – ₹12,00,000 | 15% |
| ₹12,00,001 – ₹15,00,000 | 20% |
| Above ₹15,00,000 | 30% |
Standard deduction under new regime: ₹75,000 (raised from ₹50,000 in Budget 2024).
Tax rebate under Section 87A: Nil tax for total income up to ₹7 lakh (new regime).
Old Tax Regime
| Income Slab | Tax Rate |
|---|---|
| Up to ₹2,50,000 | Nil |
| ₹2,50,001 – ₹5,00,000 | 5% |
| ₹5,00,001 – ₹10,00,000 | 20% |
| Above ₹10,00,000 | 30% |
Standard deduction: ₹50,000. You can also claim HRA, LTA, 80C (₹1.5L), 80D (₹25K–₹75K), NPS (80CCD), home loan interest etc.
Add 4% Health and Education Cess on calculated tax for both regimes.
Key Deductions Under the Old Tax Regime
If you opt for the old regime, plan these deductions carefully:
| Section | Deduction | Limit |
|---|---|---|
| 80C | LIC, PPF, ELSS, EPF, NSC, home loan principal, school fees | ₹1,50,000 |
| 80D | Health insurance premium (self + family) | ₹25,000 (₹50,000 for senior citizens) |
| 80D | Parents' health insurance | Additional ₹25,000–₹50,000 |
| 24(b) | Home loan interest | ₹2,00,000 (self-occupied) |
| 80CCD(1B) | NPS additional contribution | ₹50,000 |
| 80E | Education loan interest | Actual (8 years) |
| 80TTA | Savings account interest (non-senior citizen) | ₹10,000 |
| 80TTB | Interest income for senior citizens | ₹50,000 |
| 87A | Tax rebate | Nil tax if taxable income ≤ ₹5 lakh (old regime) |
Documents You Need Before You Start
Gather these before sitting down to file:
- PAN card — your 10-digit permanent account number
- Aadhaar — linked to PAN (mandatory for e-filing)
- Form 16 — issued by your employer by 15 June; contains TDS details
- Form 26AS / AIS / TIS — downloadable from the e-filing portal; shows all TDS deductions against your PAN, interest income, and high-value transactions
- Bank statements — for interest income calculation
- Capital gains statement — from your broker or mutual fund platform (CAS from CAMS/KFintech for MF)
- Home loan certificate — interest paid and principal repaid, from your lender
- Rent receipts — if claiming HRA
- Investment proofs — 80C, 80D premium receipts, NPS statements
Step-by-Step: How to File ITR Online
Step 1: Register / Log In
Go to incometax.gov.in. Register with your PAN if you are a first-time user. Log in using PAN + password.
Step 2: Download Form 26AS and AIS
Under "e-File" → "Income Tax Returns" → "View Form 26AS". Also check the Annual Information Statement (AIS) under "Services" → "AIS". Reconcile these with your actual income — if there is a mismatch, it leads to scrutiny.
Step 3: Select the Correct ITR Form
Go to "e-File" → "Income Tax Returns" → "File Income Tax Return". Select the assessment year, filing type (Original or Revised), and the correct ITR form.
Step 4: Choose Online or Offline Filing
- Online (recommended): Pre-fills salary, TDS, interest and capital gains data automatically. You verify and edit.
- Offline: Download the Java/Excel utility, fill it offline, generate the XML/JSON, and upload it.
Step 5: Fill and Verify the Form
The portal pre-populates data from Form 26AS and AIS. Go through each section:
- Personal information (verify PAN, Aadhaar, bank details)
- Income details (salary, house property, capital gains, other sources)
- Deductions (80C, 80D etc. under old regime)
- Tax paid (TDS + advance tax + self-assessment tax)
Step 6: Compute Tax and Pay if Due
If there is a tax liability, pay it via Challan 280 (self-assessment tax) before filing. The payment reference (BSR code + challan number) must be entered in the return.
Step 7: Preview and Submit
Review the return summary. Submit it.
Step 8: E-Verify (within 30 days)
Verification is mandatory. Options:
- Aadhaar OTP (instant) — most convenient
- Net banking — generate EVC through your bank
- Demat account — EVC from NSDL/CDSL
- Bank ATM — EVC from select banks
- Physical ITR-V — print, sign in blue ink, post to CPC Bengaluru (only for returns that cannot be e-verified)
Your return is not processed until verified. E-verification via Aadhaar OTP takes 30 seconds.
What Happens After Filing?
After successful e-verification:
- You receive an acknowledgement email at your registered email ID with the ITR-V/acknowledgement number.
- The Income Tax Department processes your return — this typically takes 30 to 90 days for straightforward returns.
- If a refund is due, it is issued to your pre-validated bank account via NECS. Most refunds arrive in 30–60 days of processing.
- You may receive an intimation under Section 143(1) — a summary of what the department computed vs what you declared. If they match, no further action is needed.
- If selected for scrutiny assessment (Section 143(2)), you will receive a notice asking for documents or explanations.
Common Mistakes to Avoid
- Filing the wrong ITR form — leads to a defective return notice; you have 15 days to rectify it.
- Not reporting all income — bank interest, capital gains, freelance income and rental income must all be declared, even if TDS was deducted.
- Mismatches with Form 26AS — always reconcile before filing.
- Not e-verifying — the return is invalid until verified; a common reason for "lost" refunds.
- Forgetting arrears relief — if you received salary arrears for previous years, claim 89(1) relief.
- Not carrying forward losses — capital losses and business losses can reduce future tax; but they can only be carried forward if the return was filed on time.
When to Consult a Professional
While salaried individuals with straightforward income can file ITR-1 themselves, consult a qualified CA if you have:
- Capital gains from property sale
- Business or freelance income
- Foreign assets or foreign income
- Notice or scrutiny from the Income Tax Department
- Multiple sources of income or significant investments
For complex situations, our income tax filing service ensures accurate and timely filing with full compliance. We also assist with TDS compliance and tax planning to reduce your overall tax burden.
This guide is for general informational purposes only. Tax laws change with each Union Budget. Consult a qualified Chartered Accountant for advice specific to your income situation.