Do you have to take the AP exams if you have already told colleges you would?

<p>The reason I ask this is that there may be no more openings for me to take the AP computer science A exam in my hometown, and the next location I can take it at is too far away. If I put down on my applications that I would be taking it this May, do I absolutely have to, or can I take it at a later date? (Also, I don’t think I’m fully ready… so I would prefer not to…haha)</p>