E-invoicing (Electronic Invoicing) is a system where B2B and export invoices are digitally authenticated by the GST Network (GSTN) via the Invoice Registration Portal (IRP). Upon successful validation, the portal generates a unique Invoice Reference Number (IRN) and a Quick Response (QR) Code. Important Note: An e-invoice is not a document generated by the GST portal. It is an invo... https://sepfust.com/blogs/e-invoicing-gst-guide-sap-automation