A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. Charitable contributions to qualified organizations may be deductible if you itemize deductions on Schedule A (Form 1040), Itemized Deductions.Please keep this written acknowledgement of your donation for your tax records. Form 8283 helps taxpayers claim deductions for noncash charitable contributions such as cars, boats, clothing, and other assets. This step-by-step guide will help you fill out the donation tax receipt and get things in order for tax season. Q. Which organizations are eligible to participate? Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. General Instructions. Use Schedule A (Form 1040) to figure your itemized deductions. A tax donation letter contains details about the donation, including the date, a description, donor information, and value.