GST Invoicing Software

GST Invoicing Software for Retail & Trading Businesses

Generate GST-compliant invoices with automatic HSN codes, tax calculations, and GSTR-ready export in seconds

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ASTech ERP's GST invoicing module eliminates the manual effort of calculating tax on every invoice. Whether you sell goods with varying HSN codes across multiple tax slabs or provide services attracting 18% GST, the system applies the correct rate automatically based on your product master. Every invoice is compliant with the Invoice Rules under the CGST Act — buyer GSTIN validation, place of supply determination, and IGST vs CGST/SGST selection happen without any manual intervention. Beyond creating invoices, the module maintains a complete data trail for GST return filing. GSTR-1 data is generated automatically from your sales invoices and can be exported in the JSON format required for portal upload. GSTR-3B summary figures are calculated from your sales, purchase, and credit note data, reducing monthly reconciliation time from hours to minutes. For businesses above the e-invoice threshold, IRN generation and QR code embedding are integrated directly into the invoicing workflow.

Why Retail & Trading Businesses Need GST Invoicing Software

Running a retail business in India means managing thousands of SKUs, handling GST invoices daily, and keeping track of stock across multiple outlets — all while serving customers. ASTech ERP brings your billing, inventory, and customer data into one platform so you can focus on selling, not spreadsheets.

Key Benefits

Zero calculation errors

GST rates are applied from the product master based on HSN/SAC codes. CGST, SGST, and IGST are determined automatically by comparing your state with the buyer's state, eliminating manual errors on every invoice.

One-click GSTR-1 data export

All B2B invoices, B2C invoices, credit notes, and debit notes are automatically categorised into the correct GSTR-1 tables. Export the JSON file directly to the GST portal without any reformatting.

E-invoice and e-way bill integration

For businesses above ₹5 crore turnover, IRN generation and QR code embedding happen automatically at the time of saving the invoice. E-way bills are triggered for taxable goods above ₹50,000 value.

Multi-GSTIN support for branch offices

Add multiple GSTINs (branches, locations) under one account. Each GSTIN maintains its own invoice series and GST reports while sharing a common product catalogue, customers, and vendor database.

How It Works

1

Configure your product master with HSN codes

Enter each product's HSN code and the applicable GST rate once. The system validates HSN codes against the official HSN master and suggests corrections if the code is invalid.

2

Create an invoice and let the system calculate

Select the customer and add line items. The system pulls the HSN code and GST rate from the product master, determines inter-state vs intra-state, and calculates CGST/SGST or IGST automatically.

3

Generate and share with one click

Save the invoice to generate a PDF with all mandatory GST fields. Share via email or WhatsApp directly from the system. For e-invoice businesses, the IRN and QR code are embedded in the PDF.

4

Export for GST return filing

At month end, navigate to the GST reports section. GSTR-1 JSON, GSTR-3B summary, and ITC-04 data (for job work) are ready for download and direct portal upload.

Frequently Asked Questions

Does ASTech ERP support all GST tax slabs including 0%, 3%, 5%, 12%, 18%, and 28%?+
Yes. All GST tax slabs including the special 3% rate for gold and 0.25% for diamonds are supported. You configure the rate at the product level using the HSN code, and the system applies it to every invoice automatically.
How does the system determine whether to apply CGST/SGST or IGST?+
The system compares the first two digits of your GSTIN (your state code) with the first two digits of the buyer's GSTIN. If they match, it applies CGST+SGST (intra-state). If they differ, it applies IGST (inter-state). For unregistered buyers, place of supply is determined from the delivery address.
Can I generate e-invoices (IRN) for transactions above ₹5 crore turnover?+
Yes. When you enable e-invoice in your settings, every invoice above ₹500 to a registered GST buyer is sent to the IRP (Invoice Registration Portal) via API. The IRN and signed QR code are returned and embedded in your invoice PDF automatically.
What is the difference between a tax invoice and a bill of supply? Can ASTech ERP generate both?+
A tax invoice is issued for taxable supplies (showing GST). A bill of supply is issued for exempt supplies or by composition taxpayers who cannot charge GST. ASTech ERP supports both document types and automatically uses the correct one based on the supply type and your registration status.
How do I handle credit notes and their GST impact on GSTR-1?+
Credit notes in ASTech ERP reverse the GST liability of the original invoice. They appear in Table 9 or Table 10 of GSTR-1 depending on whether the original invoice was in the same or a previous tax period. The system flags if the credit note exceeds the limit under GST rules.

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