The first step is to confirm what bank account information the IRS has on file for you. See: IRS: View Your Tax Account Information or, for more contact resources, see IRS Let Us Help You.
The next step would be to begin the steps to get the wrongly deposited money returned to the IRS and re-issued to the correct account.
For more information, see:
2020 Recovery Rebate Credit — Topic F: Finding the First and Second Economic Impact Payment Amounts ...
If you have already filed the 2020 tax return, see: 2020 Recovery Rebate Credit — Topic G: Correcting issues after the 2020 tax return is filed | Intern...
