@mfschield
TurboTax uses the Proper 2020 newly issued, official, IRS box numbering for a standard 1099-R
BUT if yours is a Federal retirement form, it might be either a CSF- or CSA-1099-R....and if it is, then you are using the wrong software form....You need to select the proper CSA- or CSF- form when you first started thru entering that retirement form...and yes, the software CSA- or CSF-1099-R forms do use boxes 12,13,14 in those specific form types.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*