We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. This publication explains how individuals claim a deduction for charitable contributions.What do you need to include in your donation acknowledgment letter? A gift to a qualified charitable organization may entitle you to a charitable contribution deduction against your income tax if you itemize deductions. But a completed IRS Form 8283 is required if you plan to seek a tax deduction. Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS.