I did my taxes earlier today.
What I do is I sit down and do my taxes on the all four of the big online tax prep sites. HR Block, Turbo Tax, Tax Act, and Tax Slayer.
Then I compare the numbers and make sure all four returns are consistent.
Then I compare how much each site charges to file.
This year I got my taxes won with HR Block, free Federal and State. They slip in upgrade offers that look like you have to pay but just pay attention and you can opt out.