A pre-advice is you telling us a parcel is on its way, before it lands.
Go to Packages → Create Incoming and enter the tracking number, the store, what's inside, and what it cost. It sits as EXPECTED until the warehouse receives the box; when the tracking number matches, the two are linked and it becomes a real package in your account.
Pre-advise everything. A parcel that arrives with no matching declaration has to be identified manually, and a non-pre-advised fee is added to what you pay for it. Declaring your incoming package takes a few seconds and costs nothing.
Use the carrier's tracking number for the parcel coming to our hub — the one in the store's shipping confirmation — not the store's order number.