EventNook allows to edit or update Attendees' information in the registration form. Please refer to the following steps for more details.
From the main page, go to Manage My Events → Manage → View Attendees
Find the order you want to edit the information by searching the registrants' emails or names on the top of the page.
Click on View → Edit and proceed to make changes on the attendee’s registration details
You can enter the Tagging information (e.g., Table No., VIP, Row No., etc.) which will be displayed in the Check-in App. This will be useful to arrange the seating plan for your event, you can show the registrants specific seat when they arrived on your event after they check-in.