<p>I just took the SAT subject tests on Saturday. I had registered for only World History and so took that first. However, I decided to take Literature as well and took that second. I informed my invigilator about this but he didn't seem to have any clue and he said just take the other one. Did I need to fill out any forms or anything for Literature to be counted or no?</p>
<p>You can just take the test and then tell the claims examiner and fill out a form. Then you can take the second subject and pay the money after the test.</p>
<p>^They will bill you for all the extra tests - the CB does not keep your credit card data on file.
I always register for one, and then decide whether I feel like taking more (have been doing this for years).</p>