Planner-list Setting an end-date, or due-date for a task with sub-tasks?

[Dennis Loyer <dennis jr dloyer com>]

I'm creating a set of tasks with subtasks. I'm hoping I can set a "due-date" or "end-date" for a task, and then use the work time of it's sub-tasks to determine the start date/time. I can't seem to find a way to set this up. Is this something that can be done?

Thanks,

Dennis