ERROR (Line 9339): The element 'ForeignAddressGrp' in namespace 'urn:us:gov:treasury:irs:ext:aca:air:ty18' has invalid child element 'CountryNm' in namespace 'urn:us:gov:treasury:irs:common'. List of possible elements expected: 'CountryCd, CountryNm' in namespace 'urn:us:gov:treasury:irs:ext:aca:air:ty18'.
Reason 1: Enter the wrong country code
XML (Line 9339): "<"irs:CountryNm">"Mexico"<"/irs:CountryNm">"
Solution: Use the country code for efiling by changing "Mexico" to "MX".
Reason 2: Unknown state name. (ie: use "FLA" or "Flaria" as state name for Florida )