<p>if i registered only for Biology M, can i still take Math II the day of the test even if i didn't register for it? I went on collegeboard, but there's no way to add Math II.</p>
<p>I've heard friends say that they went in planning only to take Chemistry, but ended up taking Math as well, so i'm guessing you can take as many as you want up to three.</p>
<p>I had a similar question and just found this answer a few minutes ago. I am scheduled to take three subject tests but really only need two and this answered my question; hopefully it will answer yours too!</p>
<p>[How</a> can you cancel a Sat Subject Test at CollegeBoard.com? - Yahoo! Answers](<a href=“http://■■■■■■■■■■■■■■■■■/question/index?qid=20080730111244AAFoqxq]How”>http://■■■■■■■■■■■■■■■■■/question/index?qid=20080730111244AAFoqxq)</p>
<p>Yup, you can still decide day of, you just need to let the proctor know. They’ll bill you for the test afterwards.</p>
<p>So if I go and switch my Math I test to a Math II would that be okay? (no fee added)</p>
<p>Yep. You can change your test at no charge and add a test for a later additional charge.</p>
<p>D did this last October. She went in signed up for 1 test and at the last minute decided to take 2. It was all handled at the testing location and the fee for the additional test was billed to the original credit card. There is no punitive fee added for this change.</p>