Quote from sprstpd:
If you have a wash sale that with a disallowed loss, then that loss can be absorbed into a subsequent gain. So if you are only trading one security you could probably work your way back from the last trading day in Dec 2011 and see what kind of wash sales happened at the end of the year and if up to that point the previous wash sales had been absorbed into gains. Then you might be able to calculate your disallowed wash sales that will carry over into 2012 without too much headache. Or you can buy something like TradeLog to be sure what is going on. Trying to calculate wash sales by hand has always been a frustrating experience for me in the past.
I do understand how to calculate wash sales I was an accountant for 20 plus years. What I could not understand was how IB could come up with a 54 K wash sale for my QQQ trading. Bottom line for me was I can use their form 8949 numbers , the net effect for me was my qqq loss for the year of $1800 was not allowed. This is a small amount so I donât need to go back and figure out what the correct wash sales should have been. My concern for 2012 is because their 2011 calculations were so off the wall what will it look like in 2012 .