to add a new Vehicle Type or Service Type simply click on the + Add New button to create a new line, then fill in the required details on that line.
Once Entered or Changed make sure to click the Save button to save the changes to the database
NOTE: The Vehicle Type / Service Type Service Name must be unique, check to see if there is already a Vehicle Type / Service Type of that name that may be non-active by unticking the Only Show Active Services checkbox