You must have "Full Access" or "Limited Access - HQ Tools" permissions to edit registration entries.
Sign in and turn on Edit Mode.
On the top-left corner of the screen, click on the HQ Home icon.
Click on the Registration tab, then choose Registrations.
Click on the registration title the entry is in.
Scroll down and choose Quick Report.
Click on Fields, Add a Rule of First Name/Last Name, and then input the registrant's information.
Click Update Quick Report.
On the left side, click on the registrant's Entry.
On the top of the registration entry under Entry Status, change the option from "Active" to "Inactive."
When using registration Quick Reports or Saved Reports, use the Entry Status filter to view only active or inactive registrations.