If a Task is Hidden
Try resetting your filter bar at the top of ToDoList (Incomplete Tasks, Active status, Any category). If you can’t find a task, it’s usually because you changed the filter.
ToDoList has a Quick Find box in its toolbar. Type anything in and press Enter. The next matching task is highlighted. However, this only searches the current filtered list. Make sure your filter bar settings are correct, or you may not find your task.