Donate to a certified charitable organization (QCO or QFCO), such as a 501(c)(3) organization like Phoenix Children's. A tax receipt to record your donation is available here.Simply click on "Get Tax receipt" to download a copy to complete and keep for your records. Making a donation is easy: Donate online, keep your receipt and claim your tax credit when you file. Every dollar reduces your tax liability. Learn more about these possible tax deductions here. When completing your taxes, fill out Arizona Form 321 to claim your tax credit. You'll need to enter the QCO code for your chosen charitable organization. Every dollar reduces your tax liability. If you donate money online, you may do so via PAYPAL.