If you are trying to generate a return label for an eBay order, but do not see the option available in ShippingEasy, double check that the order was not placed through eBay's Global Shipping Program.
While shipments bound for eBay Global Shipping are sent to a domestic address, this address is actually eBay's Global Shipping processing facility. The packages are then further processed and shipped oversees to the buyer.
ShippingEasy recognizes that these orders ultimately wound up oversees. Since ShippingEasy can only generate postage for shipments originating on US soil, there is not an option to generate a return label for any order part of the eBay Global Shipping Program.