Please note that without the correct routing number AND account number together, your refund will not come via direct deposit. However, don't worry! You should receive notice from the IRS when they cannot complete the direct deposit and this notice will come via US Mail. This notice will let you know that a paper check should arrive shortly. Please see the following link for more info on the IRS notice you will receive: https://www.irs.gov/individuals/understanding-your-cp53a-notice
Please see the below TurboTax FAQ for additional information:
So Can You Tell Me What happened ? Im in the same situation
if any of your direct deposit information is entered in incorrectly then your refund will reject and go back to the IRS, the IRS will then send you a notice in the mail and in a separate envelope the IRS will mail you your refund paper check. Please see the full detail in my answer above.