Orders can be returned by clicking on the Return button in the status section of the order card. This button is only shown if the order has been fulfilled. Alternately, you can click Return Order from the actions menu.
All line items in the order will be returned by default.
However, you can choose to return only some items in the order by toggling the Return All Items selector. Then choose the quantity of items to return. If you do not wish to return an item, simply leave the quantity at zero.
If an order has been returned, you'll see the dollar amount returned and a Details button that can be clicked to see additional details about each return.