I have a lot of write offs:
Usually I have $32K in schedule A
That is the sum of:
California State income tax
Property tax
Mortgage interest
Charity donations
Car tax
(I paid off student loans(so no deduction), and wasn't sick enough for medical deduction).
That is reduced by Married standard deduction $12K.
32K - 12K = 20K in deductions
My top tax bracket is 28%, so that 20K in deductions saves me $20K * 28% = $5,600 TAX INCREASE.
The last 50K will be tax at the lower 26% instead of 28%, saving $1K in tax. Net $4,600 TAX INCREASE
if both you and your wife work.