You will need to log into an event to edit your registration. If you don't have the login link handy, login here to see any upcoming and previous events you are assigned to: app.brazenconnect.com
Once you are logged in to the event, click "Registration" in the toolbar at the top of the screen.
From here you'll be able to edit any of the registration fields. Remember to save any changes before leaving this page or your profile will not be updated.