A charitable donation almost never changes your tax due or refund all by itself. First, your donation does not count "dollar for dollar"--it is calculated by a percentage based on your tax bracket. You need a LOT of other itemized deductions like mortgage interest or property taxes, medical expense, etc. to itemize and exceed your standard deduction.
Your standard deduction lowers your taxable income. It is not a refund
2016 Standard Deductions
Single $6300 (65 or older + $1550)
Married Filing Separately $6300 (65 or older + $1250)
Married Filing Jointly $12,600 (65 or older + $1250@)
Head of Household $9300 (65 or older + $1550)
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
