H&R Block has a "Standard Guarantee", in which they assume responsibility of any errors they make. That would explain why they are offering "free" double checking of last years return. :) As far as DIY goes, I agree. It's easy and free. There has only been one year I should have paid someone to do it. That year I said "I am not going to pay someone to tell me I have to pay!".. Well, I came up just a bit short and got a bill from the IRS about 8 months later. DOH!