The Form CSA-1099-R or CSF-1099-R from the OPM enters NonDisabiltiy on the form in violation of IRS procedures.
There is no such NonDisability code on a 1099-R. Just use the code shown in box 7 of the 1099-R.
If it is a code of 2 that is what you select in the dropdown for box 7 in the TurboTax program.
2—Early distribution, exception applies (under age 59½).
