How can I manually close a ticket?
It's not possible for agents to manually close a ticket, or select Closed as a status within the ticket. This is because closed tickets cannot be modified in any way and business rules and the Zendesk API sometimes make changes upon or after a ticket solve.
However, you can use triggers to automatically close tickets based on certain conditions, for example, the presence of a particular custom field value or a particular tag. Below is an example workflow.
Create a trigger that looks for a specific tag on tickets and changes the status to closed, based on its presence, see below:
If needed, create a view of the tickets you want to close. You can work through this view to add the tag to your tickets - either by updating each ticket individually or by using the bulk ticket editor to add the tag to all the tickets on the page of the View.