a group of construction vehicles in a quarry

Driver tried to log in but its not providing an option to log out of the other tablet

Single Sign-On is not enabled in the fleet and therefore you can be logged on to multiple tablets.

Contact the Fleet Manager who can enable Sign On for the Fleet

Alternatively, the Driver can go back to the Vehicle he was logged into and Sign out.

If the issue still has not been resolved, contract Haddtrack who maybe able to force the log off