Suggestion:
In Sales Return, The return option is whether the transaction to be settled through replacement /credit note. Yes, System has the facility to create credit notes if the Sales return is confirmed. System creates the credit note automatically when the header screen return option is the credit note. so on the confirmation of return option as credit note record, credit note and automatically generated. Note : System will not allow you to create a credit note when the user clicks the ‘Create CRN’ if a replacement is already given or the credit note is already made.