The Extra Score Submission Fortune Cookie can be activated from your NC inventory. Go to your NC inventory, select the Extra Score Submission Fortune Cookie, choose the option to use it, and submit to initiate the effects!
Once the Extra Score Submission Fortune Cookie is activated that way, you will automatically be able to submit scores for games a 4th time. There will be a countdown banner on the Games Room page telling you how much longer the effects of the Fortune Cookie are active for, and when it will expire.