<p>I read on collegeboard that you can substitute a test for another you are taking that day? However, does anybody know if this costs money? I was planning on taking the history test, but then I bought a book a realized I know nothing about US history.</p>
<p>No charge.
Nothing at all? O_O</p>
<p>you can.
i did it last year, i added a subject test day of.
you just take the test and they’ll bill you later.
last year it was $8 it probably went up to like $10 this time around.</p>