The Repair Categories on the Expense Tracker are based upon the Categories used in the Repair Estimator tool.

Adding Categories

If you are wanting to add a new Category to the Expense Tracker you will first need to add the Category over on the Repair Estimator.  Once you add the Category, the new category will be displayed as an option on the Expense Tracker.

Editing or Deleting Categories

Similarly, If you want to edit or delete a Category you will need to navigate over to the repair estimator and edit or delete the Category for the change to be reflected in the Expense Tracker.