Hello,
If you've already filed and your return has been accepted (or mailed), it's too late to change your bank account for direct deposit it may be claimed on the 2020 tax return as the Recovery Rebate Credit. For more stimulus information, please visit the Stimulus hub here: https://turbotax.intuit.com/stimulus-check/ or contact the IRS, they have information on how the stimulus will be delivered to you.
Hope this helps!