From what I have been told is an accepted solution for the time being, if you know the sale was S/T, just pick a date that makes it S/T, and same for if it's L/T. Your brokerage firm statement would have (well, should have) it clearly defined for you possibly by what section of your 1099-B it is in. The other option is to wait until March from what I've been told and I am sure you don't want to wait. I hope that works! Please let me know if it is not sufficient.
