GSP/ASP Provider

The entity can choose either of the following two options to generate IRN: Option 1: Using the Excel offline tool. Option 2: Through API integration directly with the e-invoice portal/IRP or via GST Suvidha Provider. For more details about how IRN is generated, read our article on How to generate IRN? Note: In both the cases, the IRP will perform a de-duplication check where the IRN so generated will be checked against the Central Registry of the GST System (containing all generated/uploaded IRN) to ensure that all IRN remain unique.