Unfortunately you will not be able to change this once your return has been accepted but if the bank account information you provided is for a closed or invalid account, the government will mail you a refund check. For mailed returns, allow 5-6 weeks from the postmark date.
If you have not filed out or your return has been rejected this link will let you go in and correct it
https://ttlc.intuit.com/replies/5619072
You can review the direct deposit account information you entered by looking on your printed return. This will be found on your 1040 under the Refund section (look for line 76).
If you have not printed your return yet, follow the steps below to access, download, and print your return:
https://ttlc.intuit.com/replies/5328626