Are you referring to the first or second stimulus payments?
If so, you will need to file a tax return for 2020 to claim the Recovery Rebate Credit.
The amount of the Rebate Recovery Credit is based upon your actual 2020 income tax return you file. Therefore, if you meet the criteria for the credit, you will receive it when you prepare your 2020 income tax return. The credit is intended to give those who should have received a stimulus payment but never did a tax credit on their tax returns. Any excess credit is then refunded to you if there is an overpayment on your tax return.
Please see the attached link for more information on who can claim the credit.
Recovery Rebate Credit eligibility
When you prepare your 2020 income tax return, be sure to do the following to ensure the credit is calculated correctly on your income tax return.
If, however, you are referring to the third stimulus payment, you will need to refer to the IRS website using the links below.
Link to check your third stimulus payment