And who is issuing the Retirment form?
IF from the US Government (from OPM, not DFAS), those are not plain 1099-R forms, they are CSA-0199-R or CSF-1099-R forms that do have some different numbering.
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IF the 1099-R is form certain City or State Retirment systems, I've seen a couple of reports where boxes numbered higher than ~10 are mis-numbered vs. the proper IRS 1099-R form number system. In those situations, you need to match the subject of those higher numbered boxes to what is presented in the TTX software forms before putting the $$ into their proper boxes. The TTX forms are numbered properly.