Effective Tax Bracket to calculate my tax

The short answer is, it depends. I'm not sure about the correct state and city rates, but assuming they are, your calculation above is likely correct if you are paying the AMT. If you are not paying the AMT, you need to reduce the federal to account for the deduction for the NY/NYC taxes (i.e. 9 + 28(.91)= 35.5%).

The thing about tax deduction is, you need to have income to deduct against. If you ever lose your income for a while, you could end up getting hit twice as hard if you depend on the tax deduction in your budget. Depending on your income and other deductions, real estate tax might not be deductible for you; many people seem to forget that.