Donation receipts are important! Here's how to create donation receipts your donors (and the IRS) will love.All donation requests must be submitted online. Written or phone requests are not accepted. Please fill out the donation form for any in-kind items provided to RMHC Greater Houston. Form. Name. Include Volunteer Activity. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. Nonprofit organizations must apply for exemption with the Comptroller's office and receive exempt status before making tax-free purchases. If you have made a gift to Catholic Charities and have misplaced or have not yet received your receipt or tax acknowledgement letter, please fill out your. How to deduct your Goodwill donations on your taxes.