The Recovery Rebate Credit is based on your 2020 federal tax return information and the 2020 AGI.
Go to this IRS website for the Recovery Rebate Credit information - https://www.irs.gov/newsroom/recovery-rebate-credit
Economic Impact Payments were based on your 2018 or 2019 tax year information. The Recovery Rebate Credit is similar except that the eligibility and the amount are based on 2020 information you include on your 2020 tax return.
