Recently, the interface that instructors used to add TurnItIn to their assignments has changed. Please see the following information about using the new TurnItIn framework.
To see the instructions for creating a new assignment using TurnItIn, click here. If you have an assignment that you imported that was previously connected with TurnItIn you will need to change the Submission Type from External Tool to Online and then select Text Entry and/or File Uploads to get the new interface. The previous External Tool, nor the one that is there currently, will work.
To find out more about the Similarity Report, click here.
To read more about TurnItIn's new AI detection tools, click here.