When you set-up your firm e-filing service provider account, you were required to add a payment account. Did you know that you should also set up a "Waiver account" for those times when there is no fee required for your filing?
To ensure fees are not inadvertently assessed when you are proceeding In Forma Pauperis or submitting an e-filing that does not have an associated filing fee, it is recommended that you set-up a waiver or "No Fee Required" account within your e-filing service provider account.
This tutorial explains how to set up such an account.