Do I need to take both the ACT and the SAT?

I scored a 36 composite on the ACT, is it necessary to also take the SAT?

No to the SAT.

Depending on the schools you’re planning to apply to, SATII subject tests may be advisable.

Don’t take the SAT, it’s a waste of money and time since you already have a perfect score. Agree with above on subject tests.

Ok thanks for the advice!