Resolved for me! 2/20/2020 2:17pm PST This is the third day and finally an update was available when I relaunched TurboTax (first Mac update since trying and failing to efile 2/17) "Critical update available..." EURIKA! After installing the update and relaunching TurboTax I "continued" to "Ready to file you return" and the validation finally worked and the efile succeeded. I was very close to giving up and snail-mailing but I was hoping that an actual corrective update was in the works. It appears it was!
