After gst return of September

This discussion explores whether an invoice issued in September can be amended to change CGST/SGST to IGST. It clarifies that IGST can only be charged for inter-state supplies. You cannot simply switch from CGST/SGST to IGST without an actual inter-state supply of goods or services, and changing the invoice after it's issued requires careful consideration of the party's GSTIN and supply type.