Sometimes you get told to use a Coordinate System that does not already exist in the TBC Coordinate Systems database. That is OK - TBC gives you the means to create the Coordinate System definition using the parameters that define the coordinate system. You can typically find the definition parameters online using Google Search. In this case we are looking for Maricopa County Low Distortion Projection - if you search for that you will find a link that displays this page of information.
The video below shows how to take the coordinate system information displayed on the sheet at the above link and enter it into the Coordinate System Manage and then use the newly defined coordinate system in TBC
Video shows you how