Read the IRS pamphlet, A Donor's Guide to Car Donations. For help in completing this form, click on the yellow question marks for instructions.Simply input your zip code and complete the form that follows. If pickup dates are available, you will then be able to schedule your pickup online. Use Form RP524, Complaint on Real Property Assessment to grieve your assessment. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. The PDF version of these forms are FILLABLE. They can be filled out electronically, then printed. The receipt they handed me just had "2 bags, clothes" listed on it. As the donor, apparently I am supposed to fill in the value.