Adding Turnitin to an Assignment
When you create an assingment in Canvas and choose the Submission Type as Online and either Text Entry or File Uploads and option will appear at the bottom of the page to Add Document Processing App. Select that and follow the instructions.

Checking the Results
When the assignment has been submitted open the SpeedGrader (found under Related Items on the right side of your screen). When in the SpeedGrader you'll open the Document Processor Reports found on the right side of your screen. There you should see the Turnitin Similarity checker and the Turnitin AI Writing checker. From there you can also open up the full report for each.
