Who Must File an ITR?
If you run any business or profession in India, you generally need to file an Income Tax Return. The rules apply to proprietors, freelancers, doctors, lawyers, traders, shop owners, manufacturers, and consultants alike.
You must file an ITR if any of the following apply:
- Your gross total income (before deductions) exceeds the basic exemption limit (₹2.5 lakh under the old regime, ₹3 lakh under the new regime).
- Your turnover or gross receipts exceed ₹60 lakh (business) or ₹10 lakh (profession) in the previous year.
- You have foreign assets or income, or are a signing authority on a foreign account.
- You deposited ₹1 crore or more in current accounts, or ₹50 lakh in savings accounts during the year.
- Your electricity bill exceeded ₹1 lakh during the year.
- You spent ₹2 lakh+ on foreign travel.
- You want to carry forward losses (only possible if return is filed on time).
- You want to claim a refund of excess TDS deducted.
Which ITR Form Should You Use?
Picking the wrong form is the #1 reason returns get rejected or marked defective. Here's the simple decision tree for businesses:
| Your Situation | ITR Form | Why |
|---|---|---|
| Proprietor with turnover ≤ ₹2 cr, opting for presumptive taxation (Sec 44AD) | ITR-4 (Sugam) | Simplest form. Declare 6%/8% of turnover as income. No books needed. |
| Professional (CA, doctor, lawyer, freelancer) with gross receipts ≤ ₹75 lakh, opting for Sec 44ADA | ITR-4 (Sugam) | Declare 50% of receipts as income. |
| Proprietor maintaining proper books, claiming actual expenses | ITR-3 | Full P&L, balance sheet required. More schedules. |
| Proprietor with business turnover > ₹2 cr (or professional > ₹75 lakh) | ITR-3 | Above presumptive threshold — books and audit may be needed. |
| Partnership firm or LLP | ITR-5 | Separate form for firms/LLPs. |
| Private Limited / OPC / Public Limited Company | ITR-6 | For all companies (other than Sec 25 companies). |
Documents You'll Need
Gather these before you sit down to file. Doing it upfront saves an hour of scrambling mid-filing.
- PAN and Aadhaar (must be linked).
- Bank account details — account number and IFSC for refund credit.
- Form 26AS — tax credit statement (download from income-tax portal).
- AIS (Annual Information Statement) — shows all your reported transactions.
- Books of account — cash book, ledger, P&L, balance sheet (if not under presumptive).
- Bank statements — for the full financial year (1 April – 31 March).
- GST returns — GSTR-1, 3B, 9 for turnover reconciliation.
- TDS certificates — Form 16A from clients who deducted TDS.
- Asset purchase bills — for depreciation computation.
- Investment proofs — LIC, PPF, ELSS, health insurance (if claiming under Chapter VI-A).
- Home loan interest certificate (if applicable).
- Last year's ITR — for opening balances and carry-forward losses.
Computing Your Business Income
This is where most people make mistakes. The "income" you declare in your ITR is not the same as cash in your bank account or your turnover.
Method 1: Presumptive Taxation (ITR-4)
If you qualify and choose Sec 44AD or 44ADA, the computation is dead simple:
| Type | Section | Income Declared |
|---|---|---|
| Business — digital receipts only | 44AD | 6% of turnover |
| Business — cash receipts | 44AD | 8% of turnover |
| Professional | 44ADA | 50% of gross receipts |
| Goods carriage operator | 44AE | ₹7,500/month per goods carriage |
Method 2: Normal Computation (ITR-3)
You maintain books and compute actual profit. The formula:
Net Profit (per P&L)
+ Disallowed expenses (personal, penalties, etc.)
− Depreciation as per Income Tax Act
+ Depreciation as per books
= Income from Business or Profession
Common adjustments to your accounting profit:
- Add back: Income tax paid, personal expenses, donations (claim separately under 80G), penalties & fines, illegal payments, capital expenditure wrongly debited.
- Reduce: Exempt income (dividends were taxable till FY 2019-20, now mostly taxable), agricultural income (separate exemption).
- Replace: Depreciation as per Companies Act / books → with depreciation as per Income Tax Act rates.
Filing Step-by-Step at incometax.gov.in
Step 1 — Register or Log In
Visit incometax.gov.in. Click "Login" and enter your PAN as user ID. If new, click "Register" first. Aadhaar OTP is the easiest verification.
Step 2 — Choose "File Income Tax Return"
Go to e-File → Income Tax Returns → File Income Tax Return. Select the relevant Assessment Year (e.g., AY 2026-27 for income earned in FY 2025-26).
Step 3 — Select Status and Form
Choose "Individual" (or HUF / Firm / Company). Then pick the right ITR form per the table above. The portal sometimes suggests a form — verify it matches your case.
Step 4 — Verify Pre-Filled Data
The portal pre-fills personal details, salary, TDS, interest income, etc. from Form 26AS and AIS. Check every field against your records. Discrepancies here cause notices later.
Step 5 — Enter Business Income
- ITR-4 users: Just enter turnover, scheme (44AD/44ADA), and declared income.
- ITR-3 users: Fill the P&L schedule, balance sheet schedule, and depreciation schedule. Reconcile with GSTR-9 turnover.
Step 6 — Claim Deductions
Old regime: enter Chapter VI-A deductions (80C, 80D, 80G, etc.). New regime: most deductions are not available, but standard deduction of ₹50,000 applies.
Step 7 — Compute Tax & Pay Balance
The portal calculates tax liability. If TDS + advance tax already paid exceeds liability, you get a refund. If short, pay self-assessment tax via Challan 280 before submitting.
Step 8 — Submit & E-Verify
Submit the return, then e-verify within 30 days. Options: Aadhaar OTP, net banking, EVC via bank account, demat account, or send signed ITR-V to CPC Bangalore.
Due Dates & Penalties
| Category | Due Date (FY 2025-26 / AY 2026-27) |
|---|---|
| Individuals & non-audit cases | 31 July 2026 |
| Businesses requiring audit | 31 October 2026 |
| Transfer pricing cases | 30 November 2026 |
| Belated / revised return | 31 December 2026 |
Penalty for late filing under Sec 234F:
- Up to ₹5,000 (if income > ₹5 lakh)
- ₹1,000 (if income ≤ ₹5 lakh)
- Plus interest under Sec 234A on tax due — 1% per month from due date until filing.
10 Common Mistakes to Avoid
- Picking the wrong ITR form. Filing ITR-1 when you have business income = defective return.
- Not reconciling with GSTR-9. Income tax department auto-cross-checks turnover. Mismatches trigger notices.
- Missing TDS credits. Check Form 26AS thoroughly — claim every rupee.
- Forgetting AIS items. AIS often shows transactions you forgot (interest, dividends, share sales).
- Wrong bank account number for refund. Pre-validate your bank account on the portal first.
- Not e-verifying within 30 days. The return becomes invalid.
- Claiming wrong depreciation rates. Use Income Tax Act rates, not Companies Act rates.
- Mixing personal & business expenses. The first thing the AO checks during scrutiny.
- Switching presumptive on-and-off. Once you opt out of 44AD, you can't return for 5 years.
- Filing without paying self-assessment tax. Return without tax payment is treated as defective.
What's Next?
Now that you know how to file your return, read these next: