The program is showing $0 loss because it is a personal house.  You can't take a loss on your personal house.  Gain or loss is in column h which shows 0.  The amount in column g is simply the offset to taking a loss on personal property.  Program is calculating correctly except you must have entered selling cost in wrong part, put who cares.  Whatever loss you have will be adjusted in column g to leave you with 0 loss reported.