Once your import is complete you will see an 'Import complete' message. Click continue to return to the course homepage.
If you find any inaccurate or missing information you can even update this yourself (it's a communal wiki).
If you have a specific question about the tool please contact the Digital Education team.
Do not import Turnitin assignments. Doing this creates a duplicate of the original Turnitin submission inbox which means any submissions made to either of them will become mixed up in the same inbox.