GST : Bank charges with reference to a Customer Transaction

Hi Team,

This is with reference to Bank Charges in AR,

the requirement is to collect Bank charges from the Customer with reference to an AR Invoice and to apply GST on this AR Invoice.

Client wants to create an AR Invoice for Bank charges with a reference to a Business Transaction (Original AR Invoice for supply of goods or Service),

and AR Invoice for Bank charges should have the details of related Original AR Invoice for the supply of goods or Service.

We have explored the option of using Supplementary Invoice feature in GST, but the Supplementary Invoice functionality works with reference to a  Price list and existing Transaction