<p>Wait, what do you mean SAT and SAT II? Do you mean you already registered for SAT I for January 23rd testing date? If then, of course you can’t register for SAT II for the same day. If you are “registered for SAT, but not for SAT II” it’s because you signed up to take the SAT I test.</p>
<p>You can only take either the SAT I or SAT II on one testing date. Now you will have to take SAT II some other date. And if that’s the case, then yes, you are in trouble. If you made a mistake and signed up for the wrong test, I would call and get it canceled (or do it online) and then register again for SAT II this time.</p>