You specified a country/region that was not recognized by the ISO 3166 country/region code system.


  "code": "InvalidCountryRegion",
  "target": "Unknown",
  "details": [
      "code": "InvalidCountryRegion",
      "number": 126,
      "message": "Invalid country and region combination.",
      "description": "The region '-1-' is not a recognized region within country '-0-'.",
      "faultCode": "Client",
      "helpLink": "",
      "severity": "Error"


Avalara recognizes all ISO 3166 country codes and some regions within these countries. Please verify that the country/region combination you are specifying matches the ISO 3166 definitions.

For more information on the international standard for ISO 3166 country/region codes, please see the ISO webpage: or the Wikipedia article listing current codes: