I am a UK developer and I'm trying to test a "en-US" skill which will be deployed in only the US using a US amazon developer account but where I told the truth about my UK address. When I try to test the skill I get an error that I am in the wrong country and cannot access In-skill Billing.
Do I need to create another US account with US address? Please let me know how you are checking for the country. I would like to test my skill with purchasing functionality.