If you are the person who logged in and applied for the permit (applicant), you can cancel your inspection using CSS.
Navigate to the permit that has a scheduled inspection on your dashboard. Click on that permit, and once the screen opens, click on the Inspections button (middle of page). The page will list the inspections scheduled. Click the blue button on the right labeled Cancel Inspection.
You also can cancel your inspection by calling the front office at 214.509.4130 before 8:30 a.m.