either:
1) that is a 2019 form 1099-R you are entering...and you can't enter a 2019 1099-R in the Online software anymore....only 2020 forms.
OR
2) The GA issuer failed to update their 2020 1099-R forms to the proper format for 2020.
For 2020, boxes 12,13,14 were changed to boxes14,15,16. If your 1099-R is an actual 2020 form, then you should call the issuer and see if they are issuing corrected forms.
OR
3) You really have a CSA-1099-R and are entering it as a plain 1099-R and have not selected the proper CSA-1099-R form during the interview...(or perhaps a CSF-1099-R)