School voucher programs have spread through conservative states, but the provision enacted last week is the first federal version. Under the new law, which takes effect in 2027, taxpayers who make donations to state voucher programs will get 100 percent of their money back when they file their federal taxes. 

This means the tax break for donating to voucher programs will dwarf tax incentives for donating to any other charity, and backers hope it will provide Americans with a powerful incentive for parents seeking alternatives to the public schools. Under the provision, a tax credit may be claimed for donations to state organizations that grant scholarships — also called vouchers — to help students pay private school tuition.