1. Go to your account’s Payment Methods related list and click New PaymentMethod.
2. Set the payment type to ACH.
3. If you want to use this payment only with a certain gateway, choose a payment gateway.
4. If you want Salesforce Billing to use this method to automatically make payments toward posted invoices, select Auto Pay.
5. Fill out the fields under ACH Details.
6. If you want to associate the payment method with an address, fill out the fields under Address Details.
7. Click Save.