Financing an Ivy League School

For Brown, https://www.brown.edu/about/administration/financial-aid/2021-22-instructions-us-citizens-and-permanent-residents says that CSS Profile is “Required from each parent when they are divorced or separated.”

With combined parental income of $275k, colleges that require both parents’ finances (including Ivy League colleges) are unlikely to give much or any financial aid.

A few prestige privates (Chicago and Vanderbilt) require only custodial parent finances, but since (as your other thread says) your parents have said that the only acceptable college is University of Florida, that does not matter. Remember, you need parental cooperation on FAFSA and (if required for the college) CSS Profile to get any financial aid, so they can veto any college they do not approve of (except possibly if you get a full ride merit scholarship).