Those numbers make no sense at all. NY State's top income tax rate is 8.82%. NYC's top income tax rate is 3.876%. Add those together and you get 12.696%. If that entirely deductible for someone at 2017's top income tax rate of 39.6% you would have a net marginal state and city rate of 7.67%. So you would pay an total marginal rate of 7.67%+39.6%=47.27%. Compare that to 2018 with 37% federal + 12.696% state & city= 49.696%.
No, you aren't going up 20%. Maybe 2.4%, but not 20%. And you would need an income of more than a million dollars to hit those rates.
It might be higher if you have a huge mortgage on a very expensive property and are hitting the mortgage deduction and real estate tax deduction for the huge amounts.
MATH!
The only subject more revealing of ignorance in (most) Americans than geography.