*Note: For B2B invoice please ensure no spelling mistake in the company name. As per the Government notification, 1st January 2021 onwards, it is mandatory to register all invoices and generate IRNs for all B2B invoices at Invoice Registration Portal (IRP). All B2B invoices should have IRN known as Invoice Reference Number (is of 64 Characters length.) & QR Code prior to sending to the customers. Please note that once the E-Invoice is generated, modification won’t be possible.