It’s easier when deducting cash donations like payments through check, cash, debit or credit cards, Electronic Funds Transfer (EFT) or gift cards. When you make a cash donation, you have to keep the receipt to show to the IRS when the time comes. These receipts have a cash amount value that you can enter on Schedule A of
Form 1040.
It takes more homework to know the value of other goodwill donations, such as clothes, food items, shoes, vehicles, jewelry, art, antiques, furniture or art. You can deduct these goods' fair market value, or the equivalent amount an item sells for in the open market.
For some goods, like recently purchased items, the fair market value is easy to find. An item's current selling price can be used to prove the value of the item you donated to the IRS. It's more difficult to find second-hand goods because you need to factor in several things that influence their fair price.