Engraving your name is done one NFA items that you reistered on form 1.
You're certainly supposed to do that, but I've done both an SBS and an SBR on a Form 1 and never bothered to have my info engraved on there and have had them inspected at gunshows by the police and never had a problem.
I'm finally getting mine done and I'd recommend you do it too, don't think that failing to do so will immediately land you in the slammer.
"Our contract called for 16 cases of rifles and ammunition for $10,000 dollars, not a machine gun...........That is our present to the General"-Pike Bishop
“When fascism comes to America, it will be wrapped in the flag and carrying a cross.”