Have you been assigned a task?
Do you need to up update that task to "Working on it" or "Completed"?
First, you'll need to locate your task. You can do this via the "My Tasks" menu item on the left side of the screen.
Click the edit link across from the task you want to update.
Or, you can find it in the "My Tasks" block that might be used on your dashboard. You'll want to click on the task name, and then click the "edit tab".
Update your progress using the drop down status menu.
And as always, remember to save!