International phone numbers are not accepted by the IRS. If your phone number is within the United States, you may consider reviewing your contact information in your TurboTax profile and correcting if necessary.
Another alternative is to list the phone number of a family member or friend to complete the filing process.
For instructions on updating your contact information, you may refer to the FAQ: How do I update my TurboTax account information? https://ttlc.intuit.com/replies/3301500