Create a new return order.

Set the order type to return, and pick the same vendor the item was ordered from originally.

Enter the model number of the item being returned and then press F6 or click the look-up button.

Select the specific physical item being returned, make sure to note the defective column, if you are returning a specific defective item it must be selected. If you just enter a single row without picking a specific item the oldest non defective item will be selected automatically for return.

Post the return order.