While Dartmouth may have “waived” your SAT subject test requirements and you are a Questbridge finalist, you are not matched and neither Dartmouth or any other school on your list has admitted you to their school yet. Should the worse case scenario happen and you are waitlisted or denied (which will happen even to students who have submitted subject test scores) at Dartmouth, will you wonder if your package was as complete as it could have been?
I still stand by my original advice, see your GC today, get a fee waiver and take the december subject test so that all of your applications can be complete.