That workflow will not work:
Problems:
1. there are >100 lines on some of the invoices -> manual entry should not be neccesary
2. the user must remember to apply the creditmemo to the original invoice - this is bound to fail
3. how to issue a new invoice with corrected prices? -> manual work is not an option
I expect that it is possible to credit and reinvoice somehow, but I cannot figure out how.
Thank you for your help on this.
Anders