@Ladyhu How much is on your 1040 line 30? If you already got the 1400 it should NOT be on line 30. Line 30 is only if you didn't get the full amount or qualify for more. If it's on line 30 you tried to get it again so the IRS took it off and sent you a bill.
But that does not account for the total difference. Do you have any children? Check line 28. You may have tried to claim the full Child Tax Credit but you already got some Advance Child Tax Credit.
