We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. To create a 501(c)(3)-compliant receipt with Donorbox, simply log in and use our easy template editor.The form and instructions are available on the IRS site and can be accessed through this link, IRS Tax Forms. Department of Taxation and Finance. Office of Real Property Tax Services. Generally, you can only deduct charitable contributions if you itemize deductions on Schedule A (Form 1040), Itemized Deductions. Let's find out how to write a donation receipt that meets IRS guidelines. The donor will use this letter as proof of his or her donation to claim a tax deduction. Note: Figure the amount of your contribution deduction before completing this form. See your tax return instructions.