Line 15 where? On the 1040 line 15 is the taxable income. Your 1099R should be on line 5a and 5b.
Say all of it is the RMD. If you are 72 it will ask you if it is the RMD. Say yes. Anything your pension pays you is considered to be the RMD. Traditional pensions automatically fulfill the rules of an RMD.
