If you’re like many Americans, letters from your favorite charities have been appearing in your mailbox in recent weeks acknowledging your 2018 year-end donations. But what happens if you haven’t received such a letter — can you still claim an itemized deduction for the gift on your 2018 income tax return? It depends. Basic requirements To support a charitable deduction, you need to comply with IRS substantiation requirements. This generally includes obtaining a contemporaneous written acknowledgment from the charity stating the amount of the donation, whether you received any goods or services in consideration for the donation, and the value of any such goods or services. “Contemporaneous” means the earlier of: the date you file your tax return, or the extended due date of your return. So if you...