I believe TurboTax is the best online tax prep available. Up-to-date, quick and concise with their questions. When I got engaged years ago, my now husband convinced me to go through his CPA to file. I agreed, and paid the large fee for the CPA that year. I went ahead and put my information into TurboTax to compare and the TurboTax refund would have been $4 more than the CPA's. I won't use any other tax prep again.
There was a continuing problem where Turbotax would not let me e-File due to an issue with a high deductible heath plan, a plan that neither my wife or myself had. Turbotax defaulted that I had to answer who had the plan, myself or my wife, before I was able to file. I went back through our HSA questions, a plan that we do have, multiple times before I found the box I had to unselect to have the capability to e-File.