<p>i'm planning on signing up for two tests right now. i might take a third but i'm not sure yet. i read that you can take additional tests and collegeboard will bill you for them later. </p>
<ol>
<li>how does this work? is there a bill you get in the mail? can you just pay online after the test? when? </li>
<li>do your scores get delayed if you add an additional test and you havent paid yet?</li>
</ol>