1. Within your Blackboard site’s Control Panel, click on Course Tools > Turnitin
    Assignments.
  1. Select the link to the submission point you wish to view.
  2. Click on the % Similarity Index next to a student’s submission.
  3. The student’s Similarity Report will open

For further instructions, please refer to Turnitin’s own online guidance:
Technical Instructions:
Viewing matching text and possible sources in the Similarity Report
Interactive demo of Feedback Studio