It can take time for your file to be uploaded to Moodle and for it to be processed by Turnitin. This can be anywhere from a couple of minutes to up to 30 minutes per file, depending on the size and format of your file and your connection speed. Ensure you leave yourself adequate time to successfully submit your assignment, especially if you are submitting multiple large files.
If you delete an assignment submission, it is your responsibility to ensure that you then submit the correct file before the deadline. Your lecturer will be able to see if you have deleted an assignment but will not be able to access the file and it will not be counted as a submission. If you have uploaded the wrong file as part of your assignment you will be able to delete the file prior to the assignment deadline (unless the Submit assignment button has been enabled)
To re-add your submission: