​​Registrants with a login can make changes and cancellations online via My Registrations. Cancellations received/processed by Oct. 7, 2020, are fully refundable. Registrants who cancel after Oct. 7​, 2020, and no-shows are responsible for paying the full registration fee. No substitution or cancellation refund is available once the event begins. If you have difficulty canceling online, please contact Accounts Receivable at 703.907.6875, or fax to 703-907-5951.