I just did my taxes using TurboTax Online, and it looks like I owe around $1500 to the govt. I've always used Turbotax, but this is by far the largest amount I've ever owed. Is H&R block or Jackson Hewitt really worth $150-$200, and will they be able to lower what I owe?

P.S. I haven't paid Turbotax yet (you don't have to until you file), so I'm not out any cash yet.