Registrants with a login can make changes and cancellations online via My Registrations. Cancellations received/processed by October 8, 2020, are fully refundable. Registrants who cancel after October 8, 2020, 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 cancelling online, please contact Accounts Receivable at 703-907-6875,​ or fax to 703-907-5951.