the real question is how is income from selling them taxed?  long- or short-term capital gain?  which is why i think the client needs to be able to send specific coins - so those bitcoin which were mined more recently, and have a higher cost of production [for miners], can be exchanged.

in any case, it's remarkable to see an entity like turbotax deal with Bitcoin - it'll do us good.  i doubt the information they're putting out about it will remain unchanged, however.