You have the ability to withdraw a submitted application from your dashboard. There is no option to fully delete an application.
To do this you will need to log in to your parent account. Each student attached to your account will be listed at the top, with the ability to select a View All button. Selecting this button will take you to a listing of all applications for that particular student.
If you decide to withdraw an application for your student, you can select the Withdraw button which will bring up a pop-up box. In this box, you will see the name of the school or program the application is for, as well as an area to enter a reason for withdrawing your student's application. This reason is required; you cannot withdraw an application without entering a reason.
If you decide to withdraw an application, you cannot re-instate the original application and must re-apply to the program.