PART 1. When all Subtasks have been completed, prompt to "Mark this Task complete?"
WHY? Since CU doesn't (yet) have the ability to group tasks under a "group label," I put related subtasks under a "group header" task which is just a placeholder. When all subtasks have been completed, I want the "header task" to go away since it's not a real task.
As shown in the photo, when the subtasks have been completed, "Send Client Statements" is also complete, so let the computer ask if it should be marked complete, as well.
PART 2. And, vice-versa, when a Task is marked as complete, prompt the user, "Mark all subtasks complete?"
WHY? Some subtasks are optional. When the Task is determined to be complete, it's tedious to mark all the subtasks complete. ClickUp wants to do that tedium for us!