SAT Subjects

I have taken the SAT subjects today.
I had registered for three subjects but I did only 2 subjects in the actual test.
I wanted to subtract one subject and informed the proctor but I think he wasn’t well informed and don"t know what to do.
I heard about the score choice option but when i select the button “Choose scores” I am not getting the option to select or unselect individual subjects. It just shows me one box to tick for the collective subjects.