<p>Straightforward question. I was accepted, but I'm not going to enroll. Do I need to respond back to them?</p>
<p>Unless you want to be rude…more so than anything it’s just common courtesy to let them no. There’s really not much reason not to say anything to them. It also helps them speed the enrollment process along if they know who isn’t going to attend.</p>
<p>Alright, so I click the “Withdraw my application” button?</p>
<p>That sounds like the right button to me :P</p>
<p>Yeah, let them know so that they have a better idea of how many people to accept off the wait-list.</p>