Seeing all your completed tutorials

Click on your Profile Page link in the main menu (this will just be a head and shoulders image if you’ve not uploaded a Profile Picture) 

and then click on the ‘Progress’ link from the drop-down menu that appears:

Once you've done this, the tutorial will appear in the ' Current and Completed Tutorials' section of the Progress Tab on your Profile Page:

if you clicked 'I've finished' by accident, or you feel you want to attempt the tutorial again, so want to mark it as incomplete, you can simply return to the tutorial page and 'mark as incomplete'.