ADDENDUM:
A couple of users have said that after making changes to the phone in the Intuit Account, the efile problem still happened, until they logged out of TurboTax then logged back in. This reset is likely more important if a user removed the phone number from their Account in order to efile.
So if you make any changes in your Intuit Account phone settings, after you save the settings, log out of TurboTax and close the browser. Then reopen it and log back in and try to efile.
If you removed your Intuit Account phone number in order to efile, you can go back and put it back in after you successfully efile.
