Hi,
You set a "display limited to" state for your custom field "country".
It is something, not logical at all so the system went to a fallback and used the default tax zone, which was not configured to the United states but was a French zone.
Removing the "display limited to" and changing this default tax zone, the system now works better.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.