Click on the goal you would like to complete.
To check off a completed task, click on the tick box next to the relevant task. You will notice that as you tick these off, the progression bar along the top of the screen moves along, displaying a percentage indicating how far into completion the goal is.
Once the goal has been completed, click complete goal located in your common tasks to the right-hand side of your screen.
Clicking complete goal will bring up a new dialogue box which asks whether you are sure that you want to complete the goal. Click complete.