Sorry--you cannot change banking information after your return has been accepted. The IRS does not allow it. You should have changed or entered correct banking information for your direct deposit before you e-filed. If the refund goes to a wrong or closed bank account, it will be sent back to the IRS and then the IRS will issue and mail a check to the address on your tax return. Make sure you have the correct mailing address on your Form 1040. This will delay your refund for a number of weeks, and you will need to watch your mail--open all mail even if it looks like junk mail.
Here is what the IRS says about entering incorrect banking information
https://www.irs.gov/help-resources/tools-faqs/faqs-for-individuals/frequently-asked-tax-questions-answers/irs-procedures/refund-inquiries/refund-inquiries-18