Just received a notice 54/w large refund check -just under 4 digits-! Odd, I owed this year and made payment over six weeks ago and the check has been cashed and cleared. Reiterating, no refund was due. I am waiting for the follow-up as promised; but I am also smelling a new scam. Just can't figure it out. IRS has not been "reachable". No surprise there. Anyone recognize this?