A tax donation letter contains details about the donation, including the date, a description, donor information, and value. The items are also tax deductible.This step-by-step guide will help you fill out the donation tax receipt and get things in order for tax season. Sample Donor Acknowledgement Letter for Cash Donation. Department of Taxation and Finance. Office of Real Property Tax Services. NOTE: The charitable contribution deduction from federal Form 1120S,. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. Also enter the name of the corporation in Paragraph First and in the title of the certificate on the last page of the form. Donation acknowledgment letters are more than just a donor tax receipt.