If you have already filed your taxes and realize you entered either the wrong routing or account number for your direct deposit of your refund, unfortunately it is too late to change it now.
What will happen now is the bank will not be able to accept this deposit and a paper check will be mailed in its place.
If you have not yet filed you can change your bank info on the direct deposit.
Follow this link for additional information:
https://ttlc.intuit.com/questions/1901677-what-if-i-entered-the-wrong-bank-account-for-direct-deposi...