My wife and I helped our adult son with the down payment for the purchase of his townhome. Our names, along with his, are on the loan documents. The 1098 lists his name first and then my wife's name. We use the standard deduction and so does he. Who enters the mortgage interest on their tax return? Us or him? Do we list it as a second home? Does he list it as his primary home. He is making the mortgage payments.
