To add or remove a payment account from your profile, you'll first need to log in to your Earnest account. Then, navigate to the "Details" section under the "Summary" tab, in order to click the green "Edit" box" by the "Bank Accounts" section. This will open the "Manage Accounts" popup box.
In the "Manage Accounts" box, to remove account, click on "Remove this bank" and follow the prompt. To add an account, click on "Add another bank." Select account type (checking/savings), and enter in routing and account numbers. If successful, the screen should display a green message saying "This bank account has been added." The account will now appear as an option for future payments.