This sounds like the same error I'm seeing.
When I add my 3rd 1998 form showing a deductable interest my CA taxes increase.
It looks like the CA 540 part II "Interest you paid" line 8a added a $-4000 value. This might be because it is adding up all 3 loan values treating my one property with 3 different refinance loans as one property with 3 different loans (a second and third mortgage, and therefore a $1.2million home/loan with different taxes).
When I add a test 4th 1998, it increase the tax by another $300 (and the 8a value changes to $-7000).
Wish I had caught this, before I efiled. Now seems like I will have to file an amendment if this ever gets fixed.
