ITR Filing for GST Registered Businesses
Any GST-registered proprietor, firm, LLP or company must reconcile GSTR-1 outward supplies + GSTR-3B turnover with ITR gross receipts. AIS now shows GST turnover; a ₹1 mismatch triggers a 143(1)(a) intimation.
- Correct form: ITR-3 / ITR-4 / ITR-5 / ITR-6
- Regime: GST turnover must reconcile with ITR turnover — 143(1)(a) intimation is instant on mismatch.
- Reconcile AIS + 26AS before filing to avoid 143(1)(a) intimations.
- Aadhaar OTP e-verification the same day.
- Free notice defence within 12 months of filing.
Definition
44ADA
Definition
44AD
Definition
Section 44AB
Typical income mix for gst registered businesses
- GST-declared taxable turnover
- Exempt / nil-rated supplies (still reported)
- Export turnover (zero-rated)
- Interest on business deposits
- Other business income
Deductions available
- Section 80C — proprietor PPF/LIC
- Section 80D — health insurance
- Section 80CCD(1B) — NPS ₹50k
- Section 80JJAA — new employee salary
- Actual business expenses (ITR-3/5/6)
Documents required
- GSTR-1, GSTR-3B, GSTR-9 & 9C
- Purchase & sales register (with GSTIN)
- Bank statements
- Depreciation schedule
- TDS/TCS certificates
- Tax audit report (Form 3CD)
Common mistakes to avoid
- GSTR-3B turnover ≠ ITR turnover (143(1)(a) instant intimation)
- Not disclosing GST refund received as income
- Missing input tax credit reversal in P&L
- Skipping tax audit above ₹1 Cr turnover (₹10 Cr digital)
- Not adjusting cash discount in ITR turnover
Worked example
An Ahmedabad textile firm with ₹4.2 Cr GST turnover reconciles GSTR-9 with ITR-5, catches ₹18L cash-discount mismatch and avoids a 143(1)(a) intimation.
GST Registered Businesses — filing snapshot
| Item | Detail |
|---|---|
| Recommended form | ITR-3 / ITR-4 / ITR-5 / ITR-6 |
| Regime guidance | GST turnover must reconcile with ITR turnover — 143(1)(a) intimation is instant on mismatch. |
| Presumptive available | Depends on income mix |
| Audit trigger | Above threshold or below deemed profit |
| Taxpex turnaround | 24–72 hours |
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Frequently asked questions
Frequently asked questions
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Related reading
- Which ITR Form Should You File in 2025? Complete Guide (ITR-1 to ITR-4)
- ITR Filing Last Date FY 2024-25 (AY 2025-26) — Complete Guide
- ITR Filing for Freelancers in India — Complete 2025 Guide
- GST Return Filing in India — The Complete Guide (2025)
- ITR-1, ITR-2, ITR-3, ITR-4 — Which Form Do You Actually Need to File?
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People also ask
When do I need reverse GST?+
When a supplier gives you a GST-inclusive price and you need to break it into base + GST for invoicing or ITC reconciliation.
via Reverse GST CalculatorWhich ITR form is right for me?+
We pick the correct form based on your income heads — salary, business, capital gains, foreign income — and confirm in writing before filing.
via Income Tax Return FilingWhat if I miss a GST deadline?+
₹50/day late fee (₹20 for nil returns) plus 18% p.a. interest. After 6 months of non-filing, GSTIN can be cancelled.
via GST Return FilingDo I need GST to register?+
GST is mandatory only if your turnover exceeds the GST threshold. Otherwise PAN is enough.
via MSME / Udyam Registration