Subtasks are not visible in the calendar view, dashboard, or team performance chart. Subtasks are only available inside of the parent task.
Tasks connected to a project:
To add a Subtask to a task, open the Advanced Options of your task.
Inside the task's advanced options, go to the Subtasks section. To add a subtask, type in the subtask and click [Enter].
To rearrange subtasks, click. To delete a subtask, click X.
Inside the project task section, a task completion update will appear on any task with subtasks.
If all subtasks are completed, the parent task will not be auto-completed and vice versa. Parent tasks and subtasks completion status are separate to allow more flexibility.