This is the first year the IRS requires reporting the cost basis. I've found what appears to me to be three glaring errors in mine. 1) In my 2011 Tax Reporting Statement under the section "Covered Securities Short Sales with Short-Term Capital Gains/Losses" all the date of sales are set to the date of acquisition. 2) The buy date is missing on many lines. In the one entry I checked, shares for two different buy dates were combined. 3) There are many incorrect wash sales. For example, I bought some Amyris on 11/3/2011 and sold on 11/14/2011. I had no other trades in Amyris for all of 2011, much less within the 30 days before or after the sale, yet there is a wash sale disallowal. I've opened tickets on each of these.