If your payment through your payroll fails - sorbet will use your primary bank account to submit that overdue payment via ACH. You can manage your bank account(s) connected to Sorbet, and preferences on Primary vs. Back Up banks under Manage Linked Accounts.
Please note: Sorbet repayment is paid through your payroll as its primary method of repayment - so ACH debits are ONLY used in the event that payroll deduction(s) fail. This is optional but if payments continue to fail, late fees may be applied if overdue payments are not addressed promptly.