Charitable contributions are generally taxdeductible if you itemize. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes.With a charitable tax deduction, you can donate to a good cause and cut your tax bill at the same time. This exemption verification is not a substitute for the completed exemption certificates that are required when claiming exemption from Texas taxes. Donation acknowledgment letters are more than just a donor tax receipt. There are certain items to include for tax purposes. Complete this form to request your donation tax receipt. Texas Applications for Tax Exemption. The forms listed below are PDF files.