An accountholder is only required to add personal bank account information one time if they would like to process reimbursements. However, if the accountholder has multiple children in the program, they will need to use the toggle feature to select each child and click "Link To Existing Account" on the reimbursement tile on their homepage.
Additional guidance from ClassWallet is available here. If you have a situation that requires using different bank accounts for children within the same family, please reach out to ClassWallet customer support. They are happy to help.