You can't enter an international phone number
in the Mailing Address & Phone number section of the Personal Interview (or in any of your TurboTax account records).
The IRS asks for
your phone number in case they have a question about your return (this is
rare). They cannot, however, call an international phone number. TurboTax representatives cannot call international numbers, either.
In order to complete and e-file your return,
you can enter the phone number of a relative or friend in the U.S,, or a
"dummy number" (800-555-1212). The
IRS will identify your entry as a placeholder number - if they have
questions, they will mail them to you.
