When you donate items to Goodwill you will receive a receipt from one of our donation attendants. Keep this receipt for your tax records.Fill in the amount of your General Fund donation in the boxes below to the right. Fill in all requested information in the SSN, name and address boxes. This is your net deduction amount. If this amount is negative you must enter the amount on Schedule ADJ, line 8a and fill in the box marked "LOSS". As mentioned above, to claim a charitable donation, you need to itemize your deductions using Form 1040, Schedule A as part of your tax preparation. Individual or business donors receive a state tax credit equal to 65 percent of the donation. Home ' How Do I Claim a Deduction? ' Donation Receipt 4.66×8.5in.