I'm also seeing errors in the California mortgage interest calculations.
My loan was refinanced and then resold. This gives me 3 different 1098 forms. When I enter the 3rd lender tax deductable interest, my California taxes increase for some unexplained reason. I tested by entering a fictious 4th lender and my California taxes increased again by nearly $400.
I reviewed the CA 540 result and see for some reason the line "Interest you paid" line 8a, 8e and 10 all have a value of $-4067 or $-7362. (resulting in a $400 tax increase, or with the test 4th a $700 tax increase)
I cannot see why this number exists. I cannot see any reason why paying addition interest (a tax deductible event) would raise my taxes (State only). I can't see why a 3rd or 4th lending would change anything.
I think there is a serious error here
