You can save payment methods to be able to quickly pay shipment invoices.
1. Click your name in the top right corner and select "Payment Method" from the drop-down menu.
2. In the Payment Method section, click “Add Payment Method” to add a "Credit Card" or "ACH" payment.
3. Enter in the required information and click "Save."
When you add a payment method for the first time, that method will save as the default. When you add more than one payment method, you are given the option to set the new method as the default method. You can click the “Set as default” button which will change that payment method to the default one.
To delete a payment method, click the trashcan icon to delete. You will not be able to delete your default payment method. You will first need to change your default payment method then you can delete it.