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Document checklists, compliance due dates and useful links — everything you need before you start a filing or registration. Need a hand? Get in touch or try our free calculators.
Document Checklists
GST Registration
Documents required depend on your business structure:
- Sole Proprietorship: PAN and Aadhaar of the proprietor, business address proof (electricity bill / rent agreement / municipal tax receipt), bank statement or cancelled cheque, and a photograph.
- Partnership Firm: All proprietorship documents, plus PAN of the firm and the partnership deed (stamped as per state rules).
- Private Limited Company: PAN of the company, Certificate of Incorporation, MOA & AOA, PAN and Aadhaar of all directors, board resolution authorising the signatory, registered office proof, bank statement/cancelled cheque, and the signatory’s digital signature.
Private Limited Company Registration
- PAN and Aadhaar of all proposed directors and shareholders
- Passport-size photographs
- Address proof (recent utility bill or bank statement) for each director
- Registered office proof: rent agreement or ownership document, plus a No Objection Certificate (NOC) and latest utility bill
- Digital Signature Certificate (DSC) for each proposed director
- Proposed company name options and business activity details (for MOA/AOA drafting)
ITR Filing (Individuals)
- Form 16 (for salaried individuals) and Form 26AS / Annual Information Statement (AIS)
- Bank statements and interest certificates
- Capital gains statements (shares, mutual funds, property), if applicable
- Proof of deductions: 80C investments, 80D health insurance, home loan interest certificate, HRA/rent receipts
- Aadhaar and PAN
Compliance Due-Date Calendar
| Filing | Due Date |
|---|---|
| GSTR-1 (monthly filers) | 11th of the following month |
| GSTR-1 (QRMP quarterly filers) | 13th of the month after the quarter |
| GSTR-3B (monthly filers) | 20th of the following month |
| GSTR-3B (QRMP quarterly filers) | 22nd or 24th of the month after the quarter (state-dependent) |
| ITR — ITR-1 / ITR-2 (non-audit) | 31st July (AY 2026-27: 31 Jul 2026) |
| ITR — ITR-3 / ITR-4 (non-audit) | 31st August (AY 2026-27: 31 Aug 2026) |
| ITR — Tax audit cases | 31st October (AY 2026-27: 31 Oct 2026) |
| Belated ITR | 31st December of the assessment year |
Due dates are as notified at the time of writing and are occasionally extended by the CBDT/GST Council — always confirm the current date on the official portal before filing.
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