What happens if you entered incorrect bank information for your direct deposit?

[lyndsyhepworth]

Now I tracked my refund and it says it has been deposited into my bank account. Obviously it hasn't because my information was wrong. How do I know that it wasn't deposited into someone else's bank account?

[NiaW]

If you've already filed and your return has been accepted or mailed, it's too late to change your bank account information for direct deposit . If the info you provided is for a closed or invalid account, your bank will return the refund to the IRS and the IRS will mail a refund check to the address provided in the return.