Allows you to use loans where you do not deduct interest. This form allows you to compare
what would happen if you took one of two
choices with some extra cash you have: prepaying your mortgage each
month, or investing it instead. This tries to take into account your
tax situation and assumes you always itemize (even late into your
mortgage when your interest will be lower. It assumes you give to
charities, and pay state and local taxes.) Change the fields as desired:
