<p>I registered for Chemistry, but I want to add literature as well on Dec. 8th. How do I go about doing this? Am I able to do it at the test center, and, if so, do I have to bring money for them there?</p>
<p>Anybody who has done this please help!</p>
<p>when i took the subject test last time, the proctor said if u signed up for one, u can just stay and take 2. She said collegeboard has ur credit card information and everything so they'll just bill u for any additional tests u take</p>
<p>They sent my D a bill and I wrote a check to pay. I don't think they're allowed to charge your credit card just like that.</p>