Do I use Form 6781 or 8949 when trading BTC Futures with Leverage Trading? Tax owed on each trade considering no USD involved? Sell all BTC before year end to pay taxes?

[Anonymous]

you need to look at certain parts of irc section 1256 to see if your trades qualify as 1256 contacts,  if they do they're reported on form 6781

https://www.law.cornell.edu/uscode/text/26/1256

here are the parts to look at

1256(b)(1)(C)   - nonequity option

1256 (g)(3) - defines nonequity option 

1256(g)(5) - defines  listed option

1256(g)(7) - defines qualified trading platform 

[fanfare]

When trading Futures, report gain or loss on Form 6781.

My broker supplies a "substitute form 1099-B" adapted to that form.
The contract is settled in Dollars, not Bitcoins.