ACT, SAT, or both

I have a 1560 on the SAT (770 RW, 790 M), and I just took the ACT for the first time and got a 35 Math, 36 Science, 33 English, and a 36 Reading (prob shouldn't have winged it 💀)

For applying to T20s, is there any one score I should send or would sending both be the best? (For STEM heavy schools like MIT or Caltech as well)