Retirement tax questions

Yeah...I'm never quite clear on the why for that.

 

My two pension 1099-R forms from Fidelity never have the distribution box filled in, even though both have NC taxes withheld.   When I go thru the software though, TTX backfills box 16 with the same value as box 2a  (a valid Box 2a value is defined for both forms).

____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*