You can find the following statuses in your tasks:
Rejected: When you have rejected a task. For example, when you have rejected a review request as a Coach.
Upcoming: When the start date hasn't started yet; you don't have to do anything about this at this point.
Expired: When the task has expired. For example, when a review has been archived.
Overdue: When the deadline has passed. You can still complete this task.