Last statement from FINCEN about BTC taxes was that trading would be taxed, and mining was not threatened yet.
It was on coindesk. But Time will tell.... btw... Taxes are NOT retro-active in USA brah, they never are. You cannot be taxed on your 2013 btc earnings unless you willingly give it away to them. There is no guideline in place yet, and when it is, it will be from then on, not reaching into the past, they cannot do that unless there was a guideline in place..
as they cannot just decide to tax you after the fact. Guideline comes first, then tax from then on.
This is off topic but this is completely wrong. FINCEN is about whether you need to register as an MSB. The IRS has nothing to do with this paper. You owe taxes on anything that you made income from (whether it is mining bitcoins or selling organic beets). Just because the beet farmer does not need to register as an MSB does not mean he does not need to pay taxes. You have misunderstood.