I am using Turbotax Deluxe online. I also was switched to Turbotax Deluxe desktop (for a separate State issue), that's where I was able to override the form. I am not seeing the "Separation from Service" option on either platform. I wonder if the software isn't making that choice available to me because I am not 50 years of age or older, and the platform is not recognizing the age doesn't matter if I have 25 years of public safety service (which is a relatively new change to the law, in the last year or two with Secure Act 2.0).
The 1099-R in question has a distribution code of 1. This is in error, it should be a 2, but since the administrator of the plan is working on fixing their error to issue a corrected 1099-R, I was told it was not likely a new one would be issued, just the problem fixed for next year. In the meantime, I was told to claim the exception on the 5329 by selecting 01 as the exception.
