You must be the provider of the of the Online Registration Period or have been given Admin permissions to update the registration period.
To update the registration deadline (a.k.a. advertised close date) and or the close date (a.k.a. Hard Close Date) for a registration sign into athletechs using your Admin or Provider account and to to the registration dashboard.
After the registration Close date passes you can still share the URL for the registration flyer but the registration flyer will no longer appear on the home page or the Open Registrations Feed and registrants will be required to enter an invite code to register. See Using Invites to Manage Late Registrations for more information.
The "Publish" indicator determines whether or not the flyer is public or private. Flyers with Publish = No do not appear on the home page or Open Registrations Feed.
Setting Active = No will ensure that nobody will be able to register, invite code or not, and regardless of registration deadline or close dates.