I think we are making a lot of assumptions about what actually happened here and disagreeing due to those assumptions. The OP said "put NA," which could mean a lot of things, and depending on what it means would be reported differently.
That said, you don't actually HAVE to select a race to use a freeform field. The FIG states this on what to report if a borrower fills in a free form without checking a race:
"If the Applicant or Borrower did not select any race(s) and only provided race(s) in the Race of Applicant or Borrower: Free Form Text Field for American Indian or Alaska Native Enrolled or Principal Tribe, Race of Applicant or Borrower: Free Form Text Field for Other Asian, and/or Race of Applicant or Borrower: Free Form Text Field for Other Pacific Islander,
beither leave this data fieldblank or enter, as appropriate, Code 1, 27, or 44."
You would have to put it under a specific race selection's free form field though, so if they just scribbled "NA" nowhere in particular, then I don't really know how I'd report it. There is no general race free form field, so I'm just going to hope that never comes up
.