Currently, the program does not allow for foreign numbers in the Basic Information section of the return.
Since the IRS does not call taxpayers, this is not an issue. Should the IRS need to contact you, they will send you a letter by mail.
You can enter a US number of a family member in case we need to reach out to you. However, most contact is made through email.
Please be sure the email address and mailing address on the account are correct. These are found in your account under Basic Information.