@BernieLehman I wonder if the sale hits the Avalara Dashboard (guessing not but will test).
@ThereseLogeais: When I tested yesterday, both the 2 and 3 character country codes gave me a 'Country Code Unsupported' which is different than user was getting. User received 'Country Code Unknown' for a 3 character DEU (Germany) code. So I do need to verify exactly what is going on. The Ship To Address takes a 2 or 3 character code, but it's when pushing the @ Avalara button that I received the message.