Since you do not have any children you can enter 0 in Schedule 8812 and it will not show any error.
- Sign in to TurboTax and open or continue your return.
- Search for Child Tax Credit and Continue.
- On the Tell us about any advance Child Tax Credit payments screen, answer No, Continue
- Enter 0 Continue
TurboTax calculated your refund before you entered the information on the third stimulus. When you entered the stimulus you received, TurboTax reduced your refund by the stimulus amount received by you.
For more information click on the link below
Recovery Rebate Credit
