No part of this document shall be reproduced without prior permission of National Informatics Centre, New Delhi. The e-Invoice Portal returns the Signed QR code and Signed invoice back to the taxpayers. The standardized e-invoice format, based on international standard (UBL/PEPPOL), has led to machine readability, enhanced interoperability and uniform interpretation in the entire eco-system. E- invoice resolves and plugs a major gap in data reconciliation under GST to reduce mismatch errors. E- invoices created on one software can be read by another, allowing interoperability and help reduce data entry errors. einvoice6 Is A Leading Government-approved Invoice Registration Portal. IRP Generates And Returns A Unique Invoice Reference Number (IRN), Digitally Signed E-Invoice , & QR Code To The User.