You can mark your task as completed within the "Activities Tab".
Mark task as complete
- Click on “Activities” to open your activity box.
- Click and select the particular task you need to mark as complete (it’s detail window will show-up at the bottom of the activities box).
- Within the Task Tools bar, click on the “Mark Complete” button.
You can mark your tasks as completed also within its related item in Pipeliner under the "Activities" tab.