A cash contribution can be limited as an itemized deduction that would require a carryover to the next tax year.
Was the amount of the contribution 30% or more than the amount of your Adjusted Gross Income on Line 11 of the Form 1040?
See the IRS Publication 526 Charitable Contributions page 14 for limitations - https://www.irs.gov/pub/irs-pdf/p526.pdf
