Go to Grade Center>Full Grade Center on the course page.
Find the Turnitin assignment column( use the thin dark grey line at the bottom of the page to scroll columns)
Click to the box under the Turnitin assignment column.
You can write the grade when the box have blue frame.
Click to the outside of blue frame, changes will automatically save and you will see Last Saved sign on the upper right corner.
Note: Please do not try to use Turnitin by uploading your own article. If you want to use it for your own article, you must send an e-mail to the library. library@mef.edu.tr