If you itemize deductions on your 2025 individual income tax return, you potentially can deduct donations to qualified charities you made last year. But your gifts must be substantiated in accordance with IRS requirements. Exactly what’s required depends on various factors. In some cases, you must have a written acknowledgment from the charity. Substantiating cash donations If you made a cash gift of under $250, documentation such as a canceled check, bank statement or credit card statement is adequate. However, if you received something in return for the donation, you generally must reduce your deduction by its value — and you must have received a “contemporaneous written acknowledgment” from the charity. Likewise, for a donation of $250 or more, you must obtain such an acknowledgment. In it, the...