<p>If I register for the SAT I, can I take the SAT II instead, and vice versa, or do I have to stick with either only the SAT I or the SAT II during registration?</p>
<p>You cannot switch between subject/reasoning. If you signed up for the subject test, you can change the subject or take more/less subject. It's on a FAQ on Collegeboard.com somewhere, go search it.</p>
<p>Thanks......!</p>
<p>If you want to switch, and the late registration deadline has passed, you have to show up and take the SAT II on standby. Make sure the testing center is actually offering the SAT II, because many do not. ALso, bring your admission ticket for the regular SAT I and you will be placed at the front of the stnadby line.</p>