WASHINGTON -- As taxpayers recover from finishing their annual filing chores, a presidential commission studying the tax laws has reached the conclusion that there are just too many deductions and credits. To help taxpayers deal with college costs there are -- depending on which applies to a particular individual -- two different kinds of tax credits, a deduction for student loan interest and special tax-advantaged savings plans. Special urban and rural tax zones encourage investment and job creation. Dozens of other tax benefits help families raise children and save for retirement, encourage adoption, nudge drivers toward hybrid cars and push...