Paid plan feature: The archive is available on paid plans - on the free plan these actions delete the tasks permanently instead of archiving them. You can start free and upgrade whenever you need it.

To archive tasks in a project, follow these steps:
Open the Project Actions Menu: Click on the three dots (...) next to the project name to open the project actions modal.
Choose Your Archiving Option:
Archiving helps keep your project board clean by removing completed or irrelevant tasks from view while still keeping them accessible in the archive for future reference.