There is a newly added RMA/Credit Memo Accounts Receivable account in User Security > Default Accounts > Sales. This will enable a user to separately track the returns.
By default the system will use the Account ID specified for Default Accounts > Sales > Accounts Receivable as the Account ID of RMA/Credit Memo Accounts Receivable.
The system will use this new default account for all RMA and Credit Memo transactions.
Reference: Task 2922