Do not list tithes on IRS Tax form 1040A. That is called the short form; the only one shorter is the 1040EZ. One uses Tax form 1040 and attaches Schedule A when itemizing deductions; itemized deductions would include ones tithes on Schedule A, Section Charitable Gift, line 16. The total at the bottom of Sch. A should be more than your standard deduction for your filing classification (single, married filing jointly, married filing separately, etc.) to be to your advantage.