Enabling Turnitin on an Canvas Assignment
Under the Plagiarism Review section, click on the dropdown  and select Turnitin. In the following dropdown menu , choose whether you would like your students’ papers to be stored in the Turnitin Repository, then check off what you like the submissions to be compared against. When the Similarity Report is generated, you have the option to exclude specific portions of the paper and enable a grammar checker . If you wish to keep these settings for future use, you can check off the box is labeled Save as default settings . The final dropdown  allows you to choose when students can access the Similarity Reports.
Viewing Plagirism Report
Within the assignment details window, click on Speedgrader.
Once in Speedgrader, click on the percentage highlighted in the red box.
The Similarity Report has different features for you to use. In the column on the right-hand side, the first button  indicates what percent of the paper was found to be plagiarized
Adding Turnitin LTI to an Assignment
Begin by creating a new Assignment. Add Turnitin to the assignment by activating Turnitin as the submission type. Students will then submit their assignments via the Turnitin system, where it will be scanned for plagiarism.