Unfortunately if you have already e-filed your return and it was accepted, please note that you will NOT be able to change your direct deposit account information and if your banking information entered was incorrectly or your bank account is closed then 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
If you have not already e-filed and your banking information transferred in from last year, see the link below for more information on how to update your banking information:
https://ttlc.intuit.com/replies/5619072