Dec SAT for current senior

Hello all. I just received my Oct sat score (2nd test) and received a 1340 which is much lower than my 1st (old) SAT score of 1980. I’m considering taking the Dec. SAT in hopes of being able to superscore something and get a higher score. Is it possible to send in my Dec scores to UCs after i get the results in case i do poorly again? Or should I just not worry about SATs and just focus on college apps? For reference, my top choices for schools are UCLA and Barnard. My GPA/courseload is solid if that’s helpful. Thanks.