Awesome Tax Expert @ToddL99 explains that "TurboTax does not accept foreign telephone numbers in its programs - the reason is that the IRS will not accept or use a foreign telephone number for contacting you about your return. They will, however, accept and use your foreign address."
Todd suggest using 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.
Check out his complete answer at Will foreign telephone numbers be accepted for e-filing?
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