<p>how does this work? I'm signed up for 2 tests and I plan to add a third one on test day (May test). Do I pay at teh test center or afterwrds?</p>
<p>You'll get a bill for the third test in the mail.</p>
<p>are we required to take 3 tests on SAT 2, or 2 tests are enough?</p>
<p>On a certain test day, you can take up to three SAT II tests. Many people opt not to take three tests on the same day, just because three different subjects is too much to study for at once. </p>
<p>Many of the top colleges require students to take two or three SAT II tests, and it's best to check with your prospective colleges for more info.</p>
<p>Thank you !</p>