I changed a class I told colleges I was going to take, How do i inform them?

<p>In my common application and various other applications I stated that I was going to take ECON 102 (macro economics) over the 2nd semester at my local city college. However I changed my mind and decided to take AP macro at my high school. How do I inform colleges? Does my counselor do it for me in my midyear report? Will this affect decisions?</p>

<p>At our school, the GC gave my D a form that stated the change that she had to sign and the school sent it in.</p>