A-ha!  More interesting data.

The diagnostic disappears if I populate a country (not county) in the Foreign address section (even with only a U.S. address populated).  So there is probably a flag in the business rule requiring the population of the Country.  The problem is, there is no "Unites States of America" as this country field belongs to the "Foreign" section, not the "U.S." section.

So, I can clear the diagnostic with a domestic address of, for example, Long Beach, California, (USA) AND the "Foreign" country of "United Kingdom" populated.  Which is of course incorrect, and there's no way I would e-file a return that way.

Business rule should be something like "if U.S. State and ZIP are populated, then Foreign Country must be blank; if U.S. State and ZIP are not populated, AND Foreign Region and Postal Code are populated, then require that Foreign Country is selected".

So how do we report bugs?

Thanks!