Will stimulus payment go into tax prepares bank account

A tax preparation agency has tax refunds deposited into their bank account so that they are assured they'll be paid for the cost of preparing. Once the refund is deposited, they deduct their preparation fee and send the remainder of the refund to clients.  Will the stimulus payment be deposited into the tax preparation agency's bank account or will their bank reject it?  Is there a way to change routing numbers before stimulus payments go out tomorrow, 4/9/20?  The tax prep agency doesn't have an answer.