Keep a record of any items you donate to a charity. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes.A donation receipt documents the details of a cash or property donation that's gifted to an individual cause or organization. Materials donated to Goodwill are tax deductible. Please retain this slip to serve as a receipt of your contributions. By donating the stock, you can potentially avoid capital gains tax. You would have to itemize your entire tax return in order to take a deduction on charitable donations. Here are some handy IRS tips for deducting charitable donations. When you bring items to one of our donation locations, you may fill out a paper donation form. After your car donation is complete, we send your tax-deductible receipt in the mail.