GST Invoicing & Compliance Guide

Pharmaceuticals in India span multiple GST slabs: 0% (life-saving drugs), 5% (most prescription medicines), 12% (some OTC products), and 18%/28% (certain medical devices and cosmetics). PharmNex lets you assign a slab per product.

Navigate to Settings → Tax Configuration. Here you can create named tax groups (e.g. "GST 5%") that automatically split the rate into CGST + SGST for intra-state, or IGST for inter-state transactions. Assign each product to the correct group.

1. 1Go to Settings → Tax Configuration
2. 2Click "Add Tax Group" and set the rate and type
3. 3Assign the group to products (individually or via bulk edit)
4. 4PharmNex auto-applies state logic (CGST/SGST vs IGST)

For registered business customers, go to Billing → New Invoice and toggle "B2B". Enter the buyer's GSTIN — PharmNex validates it in real-time. The invoice will correctly display both party GSTINs, place of supply, and tax breakdowns.

For returns or corrections, go to Billing → Credit Notes. Link the credit note to the original invoice — PharmNex maintains the traceability required for GST reconciliation. Amended invoices are automatically marked with the original invoice number.

1. 1Go to Billing → Credit Notes → New Credit Note
2. 2Search and link to the original invoice
3. 3Enter return items and quantities
4. 4Save — the credit note is linked in your GST reports

Before filing, go to Reports → GST Reports. Select the period, choose GSTR-1 or GSTR-3B, and export as JSON (for direct upload to the GST portal) or Excel (for review). The export separates B2B, B2C, HSN summary, and nil-rated supplies.