Two of the most essential GST returns that every regular taxpayer must understand and file are GSTR-1 and GSTR-3B. These returns are not just statutory obligations—they play a vital role in claiming input tax credit, maintaining credibility, and avoiding penalties.
This guide breaks down everything Goa-based businesses need to know about filing GSTR-1 and GSTR-3B.
GSTR-1 is a monthly or quarterly return that contains details of all outward supplies (i.e., sales) made by a business.
Purpose: To report all sales, debit/credit notes, and advances received.
Frequency:
Monthly Filing: For businesses with annual turnover above ₹5 crore.
Quarterly Filing (QRMP Scheme): For businesses with turnover up to ₹5 crore.
Monthly: 11th of the next month
Quarterly: 13th of the month after the quarter ends
B2B invoices (GSTIN of recipient required)
B2C large invoices (above ₹2.5 lakh)
Exports (with or without payment of IGST)
Debit and credit notes
Advances received and adjusted
Late Fee: ₹50/day (₹25 each under CGST and SGST), ₹20/day for nil returns
Blocking of E-way Bills: If not filed for two consecutive periods
GSTR-3B is a monthly self-declared summary return used to discharge GST liability.
It includes summary figures of sales, purchases, input tax credit (ITC), and tax payments. Unlike GSTR-1, it does not require invoice-wise details.
Purpose: To declare and pay tax liability for a tax period.
Applicable To: All regular taxpayers under GST
Due Date:
20th of the next month (for most taxpayers)
Staggered due dates for QRMP filers:
22nd for Category X states (includes Goa)
24th for Category Y states
Outward taxable supplies (sales)
Inward supplies on which reverse charge is applicable
Input Tax Credit (eligible and ineligible)
Tax payable and paid
Interest and late fee (if applicable)
Login to www.gst.gov.in
Go to Returns Dashboard
Select the financial year and return period
Click on ‘Prepare Online’ under GSTR-1
Enter the following:
B2B Invoices (with GSTIN)
B2C Large Invoices
Export Invoices
Credit/Debit Notes
Nil Rated, Exempted, and Non-GST Supplies
Save & Preview your return
Click on ‘Submit’, then ‘File Return’ using:
DSC (Digital Signature Certificate)
EVC (Electronic Verification Code)
Login to the GST portal
Navigate to the Returns Dashboard
Choose the return period and click ‘Prepare Online’ under GSTR-3B
Fill the following sections:
3.1: Outward taxable supplies
3.2: Interstate supplies to unregistered persons, composition dealers
4: ITC claimed
5: Exempt/Nil/Non-GST supplies
6: Payment of tax
Use available ITC to offset tax liability
If required, make payment through challan (PMT-06)
Click ‘Submit’ → ‘Proceed to File’
Whether you run a guesthouse in Baga, a water sports agency in Palolem, or a manufacturing unit in Ponda, filing GSTR-1 and GSTR-3B accurately has real-world benefits:
✅ Prevents GST notices and penalties
✅ Ensures uninterrupted Input Tax Credit (ITC)
✅ Boosts buyer confidence
✅ Avoids e-way bill restrictions
✅ Maintains a clean compliance rating (important for tenders/loans)
| Challenge | Solution |
|---|---|
| Confusion between GSTR-1 and GSTR-3B | GSTR-1 = Detailed sales; GSTR-3B = Summary return |
| Missing invoices | Use GST-compliant billing software |
| ITC mismatches | Reconcile with GSTR-2B before filing |
| Technical issues on the GST portal | File during non-peak hours or use a third-party tool |
| Late filing due to oversight | Set reminders and opt for auto-emails from GST portal |
Maintain a daily invoice log (physical or digital)
Reconcile purchase data with GSTR-2B monthly
Use professional help for monthly filing if unsure
Don't delay filing Nil returns—they are mandatory!
Keep track of amendments and corrections to previous returns
| Return | Frequency | Due Date for Goa |
|---|---|---|
| GSTR-1 | Monthly | 11th of next month |
| GSTR-1 | Quarterly (QRMP) | 13th of next quarter month |
| GSTR-3B | Monthly | 20th of next month |
| GSTR-3B | Quarterly (QRMP) | 22nd of next quarter month |
Filing GSTR-1 and GSTR-3B on time ensures that your Goa-based business remains GST compliant, avoids penalties, and builds trust with customers and vendors. As the state continues to attract both local entrepreneurs and global investors, being tax-compliant gives you a competitive edge.