If you have a GST number, it is mandatory to create GST invoices.
If you don’t have a GST number, we recommend creating a Bill of Supply instead.
Or create a new company without GST to create a Non-GST invoice.
Please follow the steps mentioned in the articles below:
1. To create a bill of supply invoice:
Note: Bill of supply invoices will also be reflected in GSTR 1 reports.