The real estate tax expenses flow to the Schedule A on Line 6, Real Estate
Taxes.
If your total deductions reported on Schedule A are less than your
Standard Deduction, Turbo Tax will maximize your deductions and claim the
Standard Deduction.
Since you saw no change in your refund when you added the deductions,
they were most likely not in excess of your Standard Deduction amount.
You can find the Standard Deduction chart at the link below
on page 25.
https://www.irs.gov/pub/irs-pdf/p501.pdf
