1099-R Form has the letter "N" in Box 8 Other

The box 7 on the Form 1099-R in TurboTax has two boxes to enter the codes.  Enter 1 as the first code and directly below enter the N as the second code.

The letter N in box 8 is extraneous.  It should not be there.  Box 8 is only for a dollar amount or a numeric percentage.  Box 7 an codes 1 and N are incompatible with each other, so the N in box 8 cannot be a misplaced box 7 code.  Ignore the "N".

Code 1 by itself indicates an ordinary early-distribution.