Why an order shows missing customs data
If an order is flagged with missing customs data, it needs a commodity code before it can ship internationally.
Click into the order, then click the SKU showing as missing customs data.
In the inventory panel that opens, press Actions, then Edit.
Scroll to Customs data and add or edit the commodity code (also known as a Harmonised Code or HS code).
Press Save.
Note: FedEx requires a commodity code of at least 8 digits. Shorter codes will be rejected when booking a label.