​​​Registrants with a login can make changes and cancellations online via My Registrations​. Cancellations received/processed 1 business day before the start date of the course are fully refundable. Registrants who cancel the day the course starts or who do not complete the course before the course’s end date are responsible for paying the full registration fee. No substitution or cancellation refund is available after the course’s start date. If you have difficulty cancelling online, please contact Accounts Receivable at 703-907-6875, or fax to 703-907-5951.