I get this stuff all the time - I usually just check the
“decline to self identify” boxes
That is what is causing this to become an issue.
The government modified the form to remove the "OTHER" box and there is no “decline to self identify” box.
Now every applicant must select a race and ethnicity - there is no other option.
If you leave it blank the FFL must reject your application.
If the FFL accepts it with a blank and sells you a weapon he can be fined or even lose his FFL license.