This is something I've never encountered before. Can someone explain this to me? I tracked my package, and its already in Anchorage Alaska, and the message below was listed with the packages location

A valid tax ID or deferment number is missing and is required for clearance. We are working to obtain this information. / Your package is at the clearing agency awaiting further release.

I appreciate any help understanding what this means.

Juan, your doing a great job. Thank you again!