Turnitin Drafts are just for you. You may use Draft 1 and 2 as many times as needed. After 24 hours, you may “resubmit” to either of these drafts and it will replace the previous report with a new one using the paper you attached. 

Once you’re ready for the faculty to evaluate, you then must submit to TurnItIn under the attempt. This cannot be resubmitted so use Drafts before to be safe.