I have used TaxCut for years and have had very few issues with it. The one year I tried the online variant of it was horrible. There was one particularly nasty bug that caused my return to be rejected twice before I had to go over the print out with a fine tooth comb. I found they were inserting a bogus figure into one of the fields instead of leaving it blank. I finally was able to work around the system to get the issue fixed, but it caused way more work and aggravation than it should have. I did try calling their "help" line, but the person on the other end was completely useless.