It's best if you log into Member Login (SSO) before registering for an event. This feature auto-populates many of the registration forms. Also, once the registration completes, you will see the event listed under Event Calendar tab in the My Registration list.
The technology also checks, as you register for an event, if your email address is already in the event registration list; it will not allow duplicate email addresses to be registered for the same event.
If the event is not listed under My Registrations list, then you did not log into the website first (Memebt Login (SSO)), or your registration did not complete.