<p>If you're registered for one SAT II and wanna take another one by the time test day rolls around, can you do so? It makes sense that you would be able to since they give you the WHOLE test book even if you're taking just one...</p>
<p>Yes. Search the board for more info - there's been a lot of threads on this exact same topic</p>
<p>yes you can do that at the test date.</p>
<p>Also, you can call them up and tell them to add another test.</p>
<p>Can you switch tests altogether? Meaning sign up for test A and just go and take test B instead?</p>
<p>Yes you can do that, except for listening subjects.</p>
<p>"If you want to take different Subject Tests than those for which
you originally registered, you do not need to contact us. You
can take the tests you want on test day -- the only exception
are Language Tests with Listening and ELPT. If you only signed
up for one or two Subject Tests and want to take additional
tests, you can do that on test day and you will be sent a bill
for any additional test(s) you take."</p>