As Lisa mentioned, is this taxpayer self employed?

ProSeries uses the Iterative Calculation for calculating the Self Employed Health Insurance deduction and the Premium Tax Credit.  Unfortunately, that calculation often does not work out cleanly.  When that happens, there is an 'extra' amount that ProSeries doesn't know what to do with, so it puts it on Schedule A.  When that happens to me, I 'nudge' things a little bit by tinkering with some numbers on the spot on Schedule C for the owner's health insurance, until it gets to a more reasonable result.

Also, that last I checked ProSeries also handles the calculation in certain situations incorrectly, which sometimes adds to the problem.