Configure account assignment category by using transaction code OME9
STEP 1 Fine the menu path of transaction code OME9.
Use transaction code SPRO to reach the configuring interface of SAP system. Then follow the menu path “SAP Customizing Implementation Guide->Controlling->Product Cost Controlling->Cost Object Controlling->Product Cost by Sales Order->Control of Sales-Order-Related Production/Product Cost by Sales Order->Check Account Assignment Categories” to get into transaction code OME9.
STEP 2 Double click the category you want to change, you can also click “New Entries” button to add new category.
STEP 3 Change the parameters of the account assignment category, then save it.