Firstly, has the lecturer chosen to make originality reports available to students? This is not always the case.
If the lecturer has chosen to make originality reports available to students, they can often take some time to generate. Turnitin's official website advice is, “the Originality Report for your submitted file is usually created within 5 to 10 minutes of submission. That is for an average paper of 500 to 1000 words. Longer papers will take a little more time.
The first three submissions will have an originality report generated as soon aspossible, after that Originality Reports for resubmitted assignments take 24-hours to regenerate. During this time, you may not have access to the Originality Report or the similarity index (percentage). ”