You need the List Adminpermissionto delete atask listif it is no longer needed by your organization to manage a process or procedure for a company, contract, or project. The individual tasks in a task list can also be deleted.
Deleting a Task List
Click the Gear Icon in theNavigation Toolbar, and click the Task Lists link in the menu.
In the Task List Browse screen,locatethe task list you want to delete, and click it to select it.
In the Task List Edit screen, clickDelete Task Listin the toolbar.
In the Confirm Delete prompt, clickYes.
Deleting a Task in a Task List
Click the Gear Icon in theNavigation Toolbar, and click the Task Lists link in the menu.
In the Task List Browse screen,locatethe task list with the list item you want to delete, and click it to select it.
In the Task List Edit screen, locate the task list item you want to delete under the Task List Item Subject header.