I have used TurboTax software for my business for the last two years. I have found it absolutely essential to my sanity. This software gave me the tools I needed to do my taxes and get them finished on time. It permitted me to review my business return, either from within the software program or in PDF format, before filing my return to be sure it was right.
Comparatively I had a lot of trouble with H & R Block's TaxCut. The person version of TaxCut caused me a lot of frustration. It kept me trapped within the interview, and wouldn't let me review my forms. The end result was that I made a major mistake on my return that cost me money. Fortunately the IRS caught it, and gave me my refund anyway. But it could easily have been otherwise.
Over the board I recommend Intuit's products, including TurboTax tax preparation software.