If you already e-filed with the wrong banking information, the bank will reject the refund. It will go back to the IRS, and the IRS will mail a paper check to the address on your tax return.
According to the IRS:
From the IRS: What should I do if I entered an incorrect routing or account number for direct deposit of my refund?
https://www.irs.gov/faqs/irs-procedures/refund-inquiries/refund-inquiries-18
If you already e-filed with the wrong banking information, the bank will reject the refund. It will go back to the IRS, and the IRS will mail a paper check to the address on your tax return.
According to the IRS:
From the IRS: What should I do if I entered an incorrect routing or account number for direct deposit of my refund?
https://www.irs.gov/faqs/irs-procedures/refund-inquiries/refund-inquiries-18