Did you already e-file? If you did NOT e-file you can go to the FILE section and change how you want to receive your refund.
Once a return has been accepted by the IRS you cannot change how you want to receive your refund.
If you e-filed:
Banking information for direct deposit is wrong
If you entered incorrect banking information for your refund, you can change it if your return is rejected. If it is accepted, however, it is too late to change it. The bank will reject the refund and send it back to the IRS. Then the IRS will issue a paper check and mail it to the address you put on your tax return. Expect a delay of at least a couple of weeks to receive your refund.
Here is what the IRS says about entering incorrect banking information
If you already filed and and are trying to change your banking information to get a second stimulus check--Congress has not voted on a second stimulus check. And there is not a way for you to update your banking information for the IRS by changing it on the TurboTax site. You will have to wait and see if the IRS gives you a way to update your banking information directly with the IRS.
@RickeyJ43 The reply you got already explained to you that you cannot change your bank information after you have filed your return. If you are asking about this because you are anticipating a second stimulus check (which Congress has not voted on) you will have to wait and see if the IRS provides a way for you to update banking information with the IRS. There is not a way to update your banking information with TurboTax for your stimulus check.