I had an issue. The amount of money withheld, 1040 line 17 did not equal the sum of the W-2 box 2's. So I should just click on line 17 to show me what composed the figure. That showed me nothing. It took a very careful reading of the IRS 1040 instructions for line 17 to determine that the tax product was correct. It shouldn't be that difficult! This took well over an hour to figure out, and I happen to be a volunteer tax preparer. I do or review well over 100 returns per tax season. Furthermore it is always a struggle to determine the taxability of last year's state refund. The product does not make it clear whether it is being taxed at all or to what degree.
The results from the H&R Block software showed a large refund which I did not expect considering last years filing. I had been paying $550 quarterly payments because I thought that I might be short. It turned out that I had a $7700 refund. But I have rationalized that and trust H&R Block software to provide the right answer and have now sent the filing in.