1) Sign in to your account
2) Click on the Plans button in your account's main navigation
3) Click on the plan you would like to update
4) Find the payer details section and click on the Update Payer link
5) Update the payer's account balance. You can either credit their account or you can create a balance due by debiting their account. To credit their account, enter a negative amount. To debit their account, enter a positive amount.
6) Click the Update button