If you chose the option for your refund to be deposited into your bank account and you entered the bank account information, then the IRS will send your refund to the bank account you supplied.
If you're not sure you entered the correct bank account information, then you can open the PDF of your tax return on your Tax Timeline to verify what you entered.
If the information is incorrect, then the bank will reject the deposit and the IRS will mail you a check.