Deleting a task in the Gantt tab
In the Hide Inactive check box is not selected. You can only delete tasks that have been inserted or added and have not been completed. You cannot delete a task if the task was part of the original action set.
tab, you can delete a task by selecting a task and clicking . The button is enabled when you are working with the task filter andOnly one task can be deleted at a time, but you can delete more than one task before saving your changes in the Gantt tab.
If you delete a task that has users assigned to it, those assignments are deleted as well.