New for 2024 due to IRS security requirements is the MFA Authentication necessity for the Desktop software. This will pair each login account with an authentication app for higher security and is set up after installing the Desktop software.
If the process was skipped it'll need to be reset
For the Admin user to reset the multi-factor authentication it's now a part of the password reset tool. You will need your Client ID, EFIN, and Registration Code.
Then once it's been reset the next time you log in with the Admin, a new QR code will be generated.
For Users, you will need to be logged into the Admin user, you will go to Tools > Utilities/ Setup Assistant > Setup > Setup Assistant. From the Setup Assistant window, you will go to Groups & Users, select the user that needs to be reset then click View/Edit. A modify user window will open.
Click the Reset Device Pairing, once it's been reset the next time you log in with the that user, a new QR code will be generated.