india-einvoiceSourced from the law Use this Guide for India GST e-invoicing: who must obtain an Invoice Reference Number (IRN) from the Invoice Registration Portal (IRP) under rule 48(4), the aggregate turnover threshold and its history, excluded classes, the rule 46(s) declaration, the QR code and HSN digits on e-invoices, the B2C Dynamic QR code rule, invoices issued without an IRN and the buyer's input tax credit, GSTR-1 auto-population and e-way bill details sent with the invoice, and configuring ERP or billing software for IRP integration and handling IRP rejections.