How to Drop a Class
Log into the website under your HSA membership.
You should be on your Parent Class Dashboard, but if you are not, choose "Classes" from the tippy top menu.
In the right, upper middle of your screen, there is a link to "Manage Class Registrations". It is right under the "Switch Dashboard View" box.
Choose "Future Classes"
Click the "Remove" box by any class name that you need removed.
To finalize, click the black "Remove" box at the bottom of the class list.