Filing GST Without a CA
Many small businesses in India file their GST returns themselves. If your business is straightforward — selling goods or services within your state, with a moderate number of invoices — you can file your own returns with discipline and the right tools.
This guide provides general information, not professional tax advice. Tax laws change frequently — verify current rules on the GSTN portal or consult a professional for your specific situation.
What You Need to File GST Yourself
- A GSTN portal account (created during GST registration)
- Proper books of accounts — sales register, purchase register, cash book, ledger
- All invoices (sales and purchases) with correct details
- GSTIN of all customers and suppliers
- HSN codes for your goods, SAC codes for your services
- Bank statements for reconciliation
- Consistent monthly discipline — file on time, every time
Monthly Filing Checklist
- Record all sales invoices with correct GSTIN, place of supply, and tax rates
- Record all purchase invoices and verify GSTIN of suppliers
- Reconcile bank statements with your invoice records
- Verify that purchase invoices appear in your GSTR-2B on the GSTN portal
- File GSTR-1 by the 11th (monthly) or 13th (quarterly)
- File GSTR-3B by the 20th (monthly) or 22nd/24th (quarterly)
- Make tax payment through the electronic cash/credit ledger
- Issue credit notes or debit notes for any corrections
When Your Turnover Reaches a Milestone
As your business grows, your compliance obligations change. Here's what to watch for:
| Turnover | What Happens |
|---|---|
| Up to ₹40 lakh | May not need GST registration (for goods, in non-special-category states) |
| ₹40 lakh to ₹1.5 crore | Can opt for Composition Scheme (1% tax, quarterly payment, no ITC) |
| ₹1.5 crore to ₹5 crore | Can opt for QRMP scheme (quarterly filing, simplified IFF) |
| Above ₹5 crore | Monthly filing mandatory, consider professional help |
Common Mistakes to Avoid
Filing late
Late filing attracts ₹50/day late fee plus 18% interest on unpaid tax. Beyond the financial penalty, late filers cannot generate e-way bills, which can disrupt your business operations.
Claiming ITC without verifying GSTR-2B
Only claim ITC for invoices that appear in your GSTR-2B. Claiming ITC for missing invoices will result in interest liability when the mismatch is detected.
Not reconciling GSTR-1 with GSTR-3B
If your GSTR-1 outward supplies don't match your GSTR-3B Table 3.1, it may trigger a scrutiny notice. Reconcile monthly.
Ignoring reverse charge
If you receive services from unregistered persons or import services, you may need to pay tax under reverse charge. This must be reported in GSTR-3B Table 3.1(d).
Not maintaining proper records
You must maintain books of accounts for 6 years from the due date of filing the annual return. This includes sales and purchase registers, input tax credit records, and all invoices.
When You Should Consider Professional Help
While you can file simple returns yourself, consider engaging a CA or tax professional if:
- You make inter-state supplies (IGST complexity)
- You deal in exports or SEZ supplies (refund claims)
- You have high-value B2C transactions above ₹2,50,000
- You are subject to TDS or TCS provisions
- You receive goods under reverse charge mechanism
- You have multiple GST registrations across states
- Your turnover exceeds ₹5 crore (annual return and reconciliation statement mandatory)
- You receive a scrutiny notice or audit notice from the department
- You have complex input tax credit situations (common inputs for taxable and exempt supplies)
Tools to Help You File
GSTSelf provides client-side tools to help you prepare and validate your returns before filing on the GSTN portal. Your data never leaves your browser.