Tried to search for "wash sales" to see if this was covered already, but all I get is the "Searching..." screen. Nothing comes back. I think I have a handle on wash sales - you can't take a loss and buy back "substantially identical shares" in 30 days, or the loss is dissallowed. For traders who close out all trades before the end of the year, or don't buy the same stocks in January that they sold in Dec last year, etc., it is of no consequence. Cost basis is just added to the new stock, so that when you sell it (in the same year in our case) you then get the loss anyway. But here comes the new 1099B rules. Section 5 is Wash Sale Disallowed. I ended up with about $7000 there. So now IRS gets col 2- Gross Proceedes, col 3 - Cost or Basis, and col 5 - Disallowed Wash Sales. Turbo Tax is just taking that out of Gross Proceeds and not even considering the sales were all year long and they were all netted out and all sold within the CY. And Interactive Brokers is of course just adding up all the stocks I bought and sold, and if they were the same and bought within 30 days they get added to the Disallowed amount. So anyway, I think I just need to add the disallowed $7K to the section 3 Basis. But then of course the numbers won't match what the IRS gets and they may decide to fu#k with me. Any words of wisdom on these new 1099s? Thanks.