New IRS Requires all software manufacturers for installation based tax programs to require authentication application to be used when logging into the system. This was setup during the initial setup process of the program, if you are locked out or you need to reset this information for Admin or any other Usernames then please use the following links for information on how to do this.
How to Setup MFA Authenticator for Install Version during Install
How to Reset MFA Authentor for Admin / Any other Users