<p>Does it matter if registered for 3 subject tests with collegeboard but choose to only write two on test day?</p>
<p>i think so. I know that you can add tests.</p>
<p>I am pretty sure you can.</p>
<p>It doesnt’ matter. You don’t need to notify the collegeboard. Just write 2 and leave the other one blank on the test day. XD</p>