SD returns Customer Wants Refund For the Amount:

-VA01: (Order Type: RE), (Item Category: REN), (with ref to sales order)
-VL01N: Return Delivery
-VL09: Goods Reversal
-VA01: Credit Memo Request (Order Type: G2), (Item Category: G2N), (with ref to Return Order, please remove billing block)
-VF01: Credit memo.
-If the customer wants refund for the amount, enter a credit memo with ref to the return