If you submit the ACT and want to submit subject test results as well can you use score choice?

Question in the title, I have a 700 in Chem and a 760 in Math 2. Should I submit them both? I only got a 1390 on the SAT but a 34 on ACT so if I can’t use score choice maybe I shouldn’t send at all

I would definitely send in your ACT, and then I don’t see any downside in using score choice (which is allowed) to submit your SAT subject tests and not your SAT. The 34 ACT is terrific, the subject tests are good but not necessary, and the SAT is weaker than your ACT.