I got the same notice. But said I owed $500.
Married Filed Jointly with my wife. I received one Letter 6419 for $500. Schedule 8812 was filled out accordingly. Just checked bank accounts, and apparently, IRS deposited 6 amounts totaling $1000, with no notice. Apparently, I'm assuming the missing $500 was from my wife's side, but she never received a Letter 6419, so we never knew about it. Glad gov't was trying to help by giving CTC payments in advance, but this was poorly communicated and executed. At least there was no penalty... I think...
