When you donate, the DGR will usually issue you with a receipt, but they don't have to. How much in donations can I claim on tax without receipts?You can only claim a tax deduction for gifts or donations to organisations which are deductible gift recipients (DGRs). Charitable contributions are generally taxdeductible if you itemize. If you donated to a nonprofit at one of our locations, you are able to access an electronic copy of our nonprofit partners' tax receipt below. How much can I claim without receipts? Tax Exempt Organization Search. Select Database Search All Pub 78 Data Auto-Revocation List Determination Letters Form 990-N (e-Postcard) Copies of Returns. Tax deductible donations give your refund a boost.