Excise reversal urgent

hi Suresh Shenoy,

GR is made,invoice also parked.Excise invoice captured and posted.now he wants resverse all the documents.

stock was moved frm quality to unrestricted.In our business it is not possible move the stock frm quality to un restricted.If u want cancel GR u need to use return delivery-122

now tell me how to do it?step by step procedure.