Explanation
E-invoicing under the CGST (Amendment) Act: mandatory for registered businesses with AATO > ₹5 crore (threshold reduced progressively). The supplier must upload B2B invoices to the Invoice Registration Portal (IRP) before issuing them to the buyer. The IRP generates an Invoice Reference Number (IRN) and digitally signs the invoice with a QR code. This IRN-stamped invoice is the only valid document for the buyer's ITC. E-invoices auto-populate GSTR-1. Exemptions: banks, insurance companies, NBFCs, passenger transport services, multiplex cinemas. Verify on the GST e-invoice portal before filing.