If your instructor has enabled late submissions for the assignment, you may upload a submission after the deadline (but before the late deadline). Note that late submissions may be subject to penalties, as determined by your instructor.
If you were not able to submit an assignment before the late submissions deadline, or if late submissions are not enabled for your assignment, please contact your TA or instructor. They can manually upload a submission for you after the deadline if they wish to allow it. The Gradescope team cannot make course policy decisions on their behalf.