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 or have been rejected then you should be able to go in and correct the account follow the link below to be able to change
https://ttlc.intuit.com/replies/5619072