The Free Tax Prep Service You Already Pay for but Probably Never Heard Of

As you fill out your tax returns each year, it might occur to you that the government already knows the answers to all the boxes you are filling out on the form. If you get paychecks, the government knows how much money you earned and how much tax was withheld. It has copies of all the same forms you have. Doesn't it seem like a waste of everybody'...