I'm an overseas filer. The TurboTax Home Business 2017 app does not accept my international phone number in the "Personal Info" section even I've selected "foreign address" from dropdown menu. My phone number apparently doesn't follow the app's validation rules, which seem to be set up for the continental U.S. 
When a filer doesn't reside in the U.S., their phone number will likely have a different format and be longer than that of U.S. residents, and the app should be set up for this.