How to View Turnitin Assignment
Option 1:
1. Navigate to Assignments
2. Select Assignment--> Select Speedgrader 
3. Select Percentage under Submitted Files
Option 2:
1. Navigate to Grades
2. Select the three dots next to Assignment--> Select Speedgrader
3. Select Percentage under Submitted Files
Similarity Report
Feedback on a Turnitin Assignment
Resources: https://www.turnitin.com/products/feedback-studio/