The Tax Cuts and Jobs Act of 2017 limited the amount of state income, sales, and property taxes to $10,000 as itemized deductions on Federal tax returns.
County and Municipality taxes related to your Sch C business property or Sch E rental properties are fully deductible on those schedules.
They are also fully deductible as business expenses on Form 1065, 1120S and 1120 businesses.
They are deductible as Itemized Deductions limited to $10,000. If the total of your Itemized Deductions do not exceed your Standard Deduction, they are not deductible anywhere else on your return.