Hi All,
This is how I fixed it:
1. Go to your Intuit Account info at the bottom-left of your TurboTax window and change your phone number to a US 10-digit number.
2. SIGN OUT of Turbo Tax and then sign back in.
3. Go back to the review/file step, where at the end you should be able to know check both email AND SMS (text) notifications
4. Click through until you get to the end and "transmit" your return.
This only worked for me after signing out and signing back in to get my number updated throughout the system.
