Should I submit my SAT?

I am a rising senior & got a 1500 on the SAT (Reading: 760, Math: 740), and a 35 on the ACT (Math: 34, Science: 33, English: 36, Reading: 35). Should I submit my SAT & ACT score or just my ACT score? My parents say I should submit both to colleges because it shows that I can do well on both types of tests, but I’m not sure as I did significantly better on the ACT. Thank you!

“Doing well on both” won’t mean anything.

The ACT is a bit higher according to the concordance, so submit that. You can send both if you want, but schools will us the higher one.