You have to reconcile the amount you got on your tax return. The Recovery Rebate credit on 1040 line 30 is only if you didn't get the full amount or qualify for more. Do you have an amount on line 30? You tried to claim it twice. But you already got it. Line 30 should be blank.
And if you are married you should each get letter 6475 for half. Did you enter the total amount you received on the Stimulus page?
