program to create Debit and Credit Memos

Hello everybody!

I am new to SAP and I need to develop ABAP program to create Debit and Credit Memos...

1. Debit/Credit memos created with header (Higher level) item and sub item/s

2. One Debit/Credit memo created per customer

3. A part of information for memos program will receive through XI (Excel file coming through XI)

maybe someone can help?

Helpfull answers will be awarded!

BR, M.