USPS treats US territories, possessions and Freely Associated States as domestic destinations. To get domestic USPS rates for these addresses, the recipient address needs United States as the country and the two-letter territory code as the state.
Many shoppers pick the territory (for example Puerto Rico) as the country at checkout. That order then imports into SKULabs with the territory in the country field, and you may see international rates only, or no rates from your carrier.
How to fix the address on a US territory order
Open the order in SKULabs.
Click Menu and select Edit order.
In the shipping address, set the country to United States and the state to the territory code from the list below (for example PR for Puerto Rico).
Save the order, then fetch rates again.
Note: Editing an order in SKULabs disconnects it from the sales channel, so later changes made on the channel are no longer imported. The channel is still notified when the order ships.
State codes for US territories and Freely Associated States
AS: American Samoa
GU: Guam
MP: Northern Mariana Islands
PR: Puerto Rico
VI: US Virgin Islands
UM: US Minor Outlying Islands
MH: Marshall Islands
FM: Federated States of Micronesia
PW: Palau
Do US territory shipments need a customs form?
Shipments to Puerto Rico and the US Virgin Islands are domestic and normally do not need a customs form. USPS requires a customs form for some other destinations even though they are domestic, such as Guam, American Samoa, the Northern Mariana Islands and the Freely Associated States. Check the customs items with the Customs button in the ship window before you buy the label.
See the USPS page on which US possessions, territories and Freely Associated States are considered domestic for the current rules.