I noticed my brokerage did not include the cost basis on quite a few options trades. My account statements are correct but the way the brokerage reported the information on the consolidated 1099 it looks like the proceeds from some of the transactions are reported as proceeds and net proceeds with no cost basis. Unfortunately you have to go back to the Federal return and amend the transactions one by one to include the cost basis and proceeds which should equal what is being reported just not broken down in the correct format. I believe someone may have mentioned this in one of the earlier threads. Good luck.
