Generally, you can deduct your contributions of money or property that you make to, or for the use of, a qualified organization. There are no tax credits available.
The deduction is allowed as an itemized deduction on Sch A. The amount of your deduction is limited to 50% of your adjusted gross income, and may be limited to 30% or 20% of your adjusted gross income, depending on the type of property you give and the type of organization you give it to.
For detailed information on donation- refer to link below
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Please note: This advice is provided with the understanding that all the relevant facts have been provided by you. Any change in facts might affect the advice given and hence may not be relied on in such cases. Nothing contained in this reply was intended or written to be used, can be used by any taxpayer, or may be relied upon or used by any taxpayer for the purposes of avoiding penalties that may be imposed on the taxpayer under the Internal Revenue Code of 1986, as amended.
There is no such tax credit available for donations under federal tax. AZ state does have such credits upto $400 (married filing joint return) for contirbutions made to recognized institutions.