Thanks krileon
Just so I am clear, which list of values am I supposed to be using? In CBSubs, the dropdown country menu in the Tax plugin does not show "US", it shows "United States".
Do my values need to match the "country_iso_code2" values in the cbsubs.tax.xml file (this shows "US" for the United States)? And - similarly - would provinces therefore need to show the "province_iso_code"?
I hope that is not the case because they are not abbreviations that many users would be accustomed to (eg CA-AB for the Canadian province of Alberta). Please let me know how it might be possible to show "nice" values to users - while still maintaining tax functionality.
I suspect I am misunderstanding, and I'm grateful for your help!