As a US importer, you have the privilege to release your goods from customs on your own.
Not many people know that for a while now, US citizens are allowed to automatically file their ISF/ Entry Summary to the CBP without the intervention of a customs broker.
For ISF, you don't need to have any special permission from the CBP.
For Entry Summary filling you need to go through a one-time onboarding process, please read about it here.