In your Canvas course site, click Assignments in the left course navigation menu.
Click on the name of your assignment.
Click the SpeedGrader button on the right.
You can use SpeedGrader to grade the students' Turnitin submissions. See the "How do I use SpeedGrader?" Canvas Guide for more information.
To see the Similarity Report, click on the Turnitin Similarity Score percentage icon on the right. This will take you into the Turnitin Similarity Report.

NOTE: For more information on the Turnitin Similarity Score and the Turnitin Feedback Studio, review the Turnitin guide on Viewing the Similarity Report.

Creating & Evaluating Turnitin Assignments