Non-Inventory items are non-tangible items you sell. Some examples are delivery or freight charges, repair services, or assembly charges.
Discounts are also created as
Non-Inventory Codes. You include non-inventory items on a sale similar to the way you include inventory items.
If you want to include a non-inventory item automatically each time a certain inventory item is sold, see
Attaching Non-Inventory Items (Services) to Stock Items.