<p>Hi Guys-I'm signed up to take Math II and World History, but I kind of want to add a third test (Math I)... Can I just complete Math I and then will college board bill me for the extra test? Or am I not allowed?</p>
<p>According to the collegeboard site: “Changing Subject Tests on test day
You can take a different test from the one you signed up for as long as you don’t try to switch to a different Language with Listening Test. If you decide to take fewer tests than you signed up for, simply turn in your answer sheet before the next test begins. Once you start answering a test, you can’t decide not to take it and will have to cancel all tests taken that day to avoid having it scored. You can also add a test on test day, and you will receive the bill for the test fee.”</p>