I amended my tax return to include my 1098-T form, which resulted in a Federal Refund. Do I need to mail my 540x if there is no balance due or refund?

I forgot to include my 1098-T form when I filed my taxes. I amended my return, which resulted in a Federal Refund. My state taxes, however, have no change (i.e. no balance due and no refund)... Do I still need to mail the 540X? And if so, why does it print out saying FORM NOT FINAL, DO NOT FILE, even though I've reviewed my taxes and everything "checks out"?