Step 1) Enter the transaction code FB75 in the Command Field
Step 2) In the next screen, Enter the Company Code for document to be posted
Step 3) In the Basic Data tab , Enter the Following data
Enter the Customer ID of the customer to be issued the credit memo
Enter the Document Date
Enter the Amount to be credited
Enter the tax code used in the original invoice
Check the Calculate Tax check box
Step 4) In the Item details section, Enter the following data
Enter the Sales Revenue Account for the Original Invoice was posted
Enter the Amount to be debited
check the Tax code
Step 5)Check the status of the document
Step 6) Press Post button from the Standard Toolbar
Step 7) Check the status bar for the document number to be generated
You have successfully posted a customer credit memo for the Sales Return