A tax donation letter contains details about the donation, including the date, a description, donor information, and value. Learn how to write effective fundraising letters that inspire more support from donors.Explore best practices and templates in this comprehensive guide. Many different kinds of organizations are exempt from paying sales tax on their purchases or may qualify for sales tax exemption in New York State. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. Learn more about the potential tax benefits of charitable holiday giving. Your holiday donations may boost your refund, depending on the organization. Donation acknowledgment letters are more than just a donor tax receipt. There are certain items to include for tax purposes. Step 1: Complete the taxpayer information section.