The "tax" year for 1099 purposes would be 2014.
No way to tell from the information if this RMD is for the "distribution calendar year" 2013, or "distribution calendar year" 2014. For 1099 purposes it is immaterial, but for the actual RMD calculation it makes a difference.
Odds are good that this is for the 2013 "distribution calendar year" and that a second RMD, for "distribution calendar year" 2014 will need to be taken by 12/31/14.