Quote from jackpearson:
why not just compute the 8949 yourself & forget the 1099-B numbers that are wrong? The IRS can't complain if your numbers match up to your trade list. As long as you can prove via your trade history your numbers are correct, there's no problem.
I'll certainly defer to Robert Green, but my concern would be if there is a mismatch, the IRS gets the 1099B numbers from IB and their computer expects them to match the 8949.
