How do i change the Sat subject tests i'm taking?

Question

I have the SAT subject tests tomorrow. I'm signed up for History and Literature. I meant to sign up for chem. Apparantly i can add it the day of. How do i go about doing this? Do i talk to someone before, is there a checkbox on the exam, do i tell a proctor, what?

Answer 1

You would just stay until the 3rd test is given and take it.