Is there a maximum number of submissions permitted on ‘Turnitin’ before the deadline date?
For every module there should be a “Draft Checking Facility” link within the assessment tab for the module in Moodle. You can upload your assessment to this link as many times as you like prior to the deadline date. Using the draft checking facility will allow you to check that your assessment file can be uploaded correctly and view a similarity report.
The final submission link should only be used for when you want to submit the final version of your assessment for grading.