TurnItIn is a tool we use to determine when an assignment has copied text. It is called the Originality Verification (OV). The classroom will automatically run your work through the OV check when you submit to a Discussion Board post or upload an Individual Project submission. There is nothing extra you need to do to make this happen.
It is possible to do a draft check of your OV Score before you submit your assignment to your instructor. Check out the Student Success Center information on the OV Tool to learn how this works.