A nonrefundable individual tax credit for voluntary cash contributions to a qualifying charitable organization (QCO). The tax credit is claimed on Form 321.Learn more about these possible tax deductions here. Use CCS' Qualifying Charitable Organization (QCO) Code 20345. Complete the Arizona Tax Forms 321 and 320 and include them with your return. When completing your taxes, fill out Arizona Form 321 to claim your tax credit. The 2025 ultimate Arizona Charitable Tax Credit guide for the 2024 tax year. Learn how to use AZ state tax credits to your advantage. A gift of cash is the simplest and most convenient way of giving to the Foundation. Cash can be given in the form of currency, check, or money order.