I’m sure that the prep software will be just as reliable as the HealthCare.gov website.
Surprisingly - the software they have developed is pretty decent. I was a tax volunteer on the last Base I was on and we used IRS software to do folks' taxes - worked at least as good as any other I used and had easy options to bump the difference between filing married-joint or married-separate, etc.
What I didn't like is that some Latinos were adding folks who were obviously illegal aliens to their returns and the rule was to "just do it" - seems the IRS is a lot easier on alien law breakers than conservatives.