To check if your credit/debit note data is interstate or intrastate, you can follow below steps:
Step 1: Go to Display and click on GST reports.
Step 2: Under GST reports click on GST returns.
Step 3: Open relevant gst return such as GSTR 1 or GSTR 2 return data.
Step 4: Then open the relevant section for debit credit notes section. So, you will the the field of place of supply.
Step 6:If the place of supply of the party is different from your state, then the supply is interstate and IGST tax will be shown. If the state of the party is same as your state, then the supply is intrastate and CGST and SGST will be tax will be shown.