I assume you got a new phone but with the same number or got a new number and shut off the old one.
Log into your TT account and change the password to block access ... also make sure the phone number and email are up to date as well. Turn on the 2 step verification as well.
To update your TurboTax account, see this TurboTax support FAQ - https://ttlc.intuit.com/questions/1900724-how-do-i-update-my-turbotax-account-information
