Every year, I go ahead and self-prepare my taxes, and then type all the data into Turbotax to see if they find something I missed, and every year they do, and it's in my favor (and always worth more than the Turbotax fee). OTOH, I've seen suggestions that Intuit themselves have had a hand in making the tax preparation process so complex that humans can't possibly get it right without them.
Every year, I go ahead and self-prepare my taxes, and then type all the data into Turbotax to see if they find something I missed, and every year they do, and it's in my favor (and always worth more than the Turbotax fee). OTOH, I've seen suggestions that Intuit themselves have had a hand in making the tax preparation process so complex that humans can't possibly get it right without them.