Standby please help!!!!!!

<p>Ok I am a senior and I scored terribly on the September act (20) and I want to take the one I'm October but I missed the deadline. Bash me all you want I know I'm stupid. The last test I can take for UCs is in December but I just found out about standby testing. Where do I get the form? How do I pay? How do I check what test centers have seats? PLEAS HELP!!</p>