<p>From what I understand, @bsmom123, you are free to change it as often as wish within the allotted time frame. I do not believe there are any requirements about the changes, at least from NMSC. You’d really want to check with the schools to see what their requirements are. For example, if NMSC mails out to colleges who have been named first choice at the beginning of March and again at the end of March, will Santa Clara officials notice (or care) that your son had them listed at the beginning of March but not at the end of March? I suspect if you call their scholarship representatives, they will help you determine the best course of action. Good luck!</p>