Help Guide › Reseller
When you make a receipt you can add postage and any other charge of your own — a rush fee, an admin fee. They print on the receipt under your own business name, once for the whole order rather than per product.
These are yours. The house never sees them and never takes a cut: what you owe them is the reseller rate on the stock, which does not change because you charged your buyer for delivery.
Your courier and tracking number go on the same screen, so a buyer can follow the parcel without asking you.