A lawyer prepared my 2013 1040. He entered "2300" on Line 19 of Sch D, which requires use of Sch D Tax Computation Worksheet, which showed $57000 due in taxes; but he used Qualified Gains & Cap Gains Worksheet and calculated $29000 in taxes. Which amount do I owe? If the larger, how could the entry of $2300 extra on Schedule D cost me an extra $28000 in taxes?

It seems obvious to me that something is wrong here, and know I should ask the lawyer, but I expect he will be somewhat defensive if I imply that he did something wrong.

I noticed this whole snafu when preparing the data for this year's return, and I really don't want to do another return that may be way off in amount of tax due. Hope you can help me.