Learn how to easily create your donation receipts and the best practices to follow in the year-end receipts to your donors. Donations are generally tax deductible.We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. When completing your taxes, fill out Arizona Form 321 to claim your tax credit. 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. The tax credit is claimed on Form 321. Donation receipts are important! Here's how to create donation receipts your donors (and the IRS) will love. When completing your taxes, fill out Arizona Form 321 to claim your tax credit.