When you post a sales credit memo, the program creates a sales credit memo that can be seen in the Posted Sales Credit Memo window.
The sales credit memo was created when you clicked the Posting button on a sales credit memo and then chose Post or Post and Print.
A sales credit memo consists of a sales credit memo header and one or more sales credit memo lines.
The sales credit memo header contains all the relevant information about both the sell-to and bill-to customers such as name, address, document number, and date. The program copied the information from the sales header when it was posted.
Sales credit memo lines contain information (such as item number, quantity and price) copied from the posted sales line.
You cannot change any of the fields on a sales credit memo header or lines because the credit memo has already been posted.