How to upload invoices in GSTOne portal?
For NPCI invoices, Invoices need to be uploaded through Zip file by renaming the file as Product_YYYYMM. For Customized invoices, First enable the tab of Customized invoices Then Invoices need to be uploaded through Zip file by renaming Product_YYYYMM along with GSTR1 (should be in NPCI format only).