Under CRM > Modules & Fields > Tasks Template > 'Status' Picklist...  If I add a custom status (ex: 'Expired' or 'Junk') How can I tell Zoho to treat that status the same as 'Complete'?

Currently, if I open the Contact (tied to the task) and look under the "Open Activities" section, then tasks with these custom statuses are still marked as an "Open Task"  (When I want them to appear under "Closed Activities" together with tasks that have a 'Completed' Status)

How would I do this?