Donation receipts are important! Here's how to create donation receipts your donors (and the IRS) will love.We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. The potential tax-deduction is based on the stated value of the goods and services provided. This letter will serve as a receipt. Fill out your contact information and the details of your gift below. Once your gift is verified, we'll send your letter to the address you listed below. Bystep guide on how to fill out a Goodwill tax donation receipt. This form is available at our stores in Maine, New Hampshire and Vermont. Tax receipt letters can be given out in person or mailed.