The amounts from your non-cash contributions flow to Line 17 on Schedule A. If
your total deductions reported on Schedule A are less than your Standard
Deduction amount, then Turbo Tax will deduct the Standard Deduction to give you
the greatest reduction in your Taxable Income.
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
