SAT Subject Test URGENT Question

<p>First of all, good luck to each and everyone of you that is taking the SAT Subject test tomorrow.</p>

<p>If I stated on my UC App's that I plan to take the Physics test tomorrow, is it okay if I back out and I take the Bio instead? I did not have the time to study, but I feel I can do a lot better on bio. Will doing this hurt me when UC's pick and choose student admission? What do I tell the UC's? Do I tell them I didn't submit the score because I didn't take it or do I tell them straight up I took a different test then what I put as I was planning to take? I am freaking out!!</p>

<p>By the way I applied to UCI UCSB UCR UC Davis for Computer science (yes I am taking math II test as well!)</p>