If you have submitted the incorrect paper and you are unable to upload a resubmission of the correct paper to Turnitin, it may be that resubmissions have not been enabled for the assignment and you will need to contact your instructor directly to check if resubmissions are allowed.
If you are trying to resubmit a paper after the assignment due date has passed, you will not be able to. Please note that this is intended behavior. Resubmissions are not allowed once the assignment due date and time have passed, even if the assignment allows for late submissions to be made. Late submissions are only available for first submissions.
Your instructor should be able to decide whether to enable resubmissions, delete the submission to allow you to make another, or potentially submit it on your behalf. Please reach out to them to discuss this.