My unit has a batch of goods exported to the United States, but foreign exchange is received from South Korea.
Our company also has this problem. For goods shipped to one country, the payment is paid by another country, which has no effect on tax refund. You can fill in the form normally on the foreign exchange network, but it doesn't seem to matter in the electronic port. Just hand in the documents, but it's better to adjust the customer's name financially or it's unfair.