Turnitin assignments can be re-used from year to year. All assignments are recycled at the end of the previous academic year and the student attempts and submissions removed.
Click on ‘modify’ next to the assignment and change the dates for the new deadline for the current year. Don’t forget to update the deadline in the text box as well. You will need to refresh the list of students by using ‘roster sync’ to list them all in the Turnitin Assignment inbox. This means you will be able to see which students have not submitted thier work.