You can’t edit a submitted assignment, but you may be allowed to resubmit it. However, you can’t resubmit all assignments. Check if you can submit an assignment more than once. If you can’t and made a mistake, you must contact your instructor to ask for the opportunity to resubmit the assignment.

In the Original Course View, if your instructor allows you to submit an assignment more than once, a Start New function appears on the Review Submission History page. Select the assignment link in your course to access the Review Submission History page.