​​​​​Registrants with a login can make changes and cancellations online via My Registrations. Cancellations received/processed by October 30​, 2021, are fully refundable. Registrants who cancel after October 30, 2021, and no-shows are responsible for paying the full registration fee. No substitution or cancellation refund is available once the online course begins. If you have difficulty canceling online, please contact Accounts Receivable at 703-907-6875 or​. ​