How do I update an planned AP which I ended up not taking?

Hey all, I was accepted to Berkeley recently. In its CalCentral page, it is telling me to provide exam scores for all the AP tests which I have completed and also planned. However, I didn’t take one of them I have planned this year. What’s the best way to report this. Should I use the update form? Should I directly contact AO? Or should I just leave it there?

Just email admissions and let them know you did not take the AP exam.

Contact admissions, whether it be through email or phone (I’d rec email though, simply because it’s easier to communicate the information) and let them know of this update. They’ll let you know what steps to take if there are any required.