In the case that you have submitted a file in Turnitin but need to re-submit a new file, you will first need to see if you are allowed to do this.
If you have already submitted a paper and the due date for the submission has now passed, you will not be able to re-submit, even if the settings state that late submissions and re-submissions are allowed. You may want to contact your instructor to see if they will resubmit on your behalf.
If it is before the due date, you can check the assignment setting by click on on the drop-down arrow next to the assignment title. Look in the Additional Settings area for information on late submissions. If this is allowed, use the Upload icon to upload a new file. You can find this icon next to the Download icon, and it will look like an arrow pointing up out of a box. Follow the instructions thereafter to upload a new file.
Important: If your assignment has the setting ‘Similarity reports are available immediately after submission’, this will only be generated immediately for the first three submissions. At the fourth submission (and any additional submissions beyond this), the report will be generated after 24 hours.