You must have "Full Access" or "Limited Access - HQ Tools" permissions to edit registration content.
NOTE: You will only be able to update inventory on a store item that already has inventory.
Sign in to "SportsEngine HQ."
Once in "SportsEngine HQ," click on the Registration tab, then choose Registrations.
On the right side of the page, click on the registration "URL."
Go to the question on the registration that needs editing.
Make sure you click Edit Mode on the "Welcome" or "Receipt" pages and Preview/Review Mode while on any other page.
Next to the store item amount, you will see a box with the remaining inventory.
Input a new number for the inventory and click Update Max Inventory.