It's my first year to report gain & loss of my IB.
Most time, I still use excel, then manually type in the numbers.
Since 2011, sounds it changed a lot. Not many fields user still could control. Before you file, IRS already knows the numbers.
be careful, my IB 8949 PartA "cost basis" and "washsale adjustment number"are wrong!!!!!!!!!!!!!!! fortunately 1099B's PartA number is correct.
8949 PartB and PartC seem to be correct.