If you read any of the previous postings, you would realize we have already tried all your suggestions.  Called customer support and get different answers every time.  Some say it must not be available, and others say it is available and should be working.  Nobody at Intuit as a definitive answer.

We are trying to start using the new Shipping Manager, but it is not available in the menu (File/Shipping Manager...) and when I try via Settings from the old shipping manager, I never get prompted to try or start using the new Shipping Manager.  And, yes we have the very latest version.  In our case it is QBDT Premier 2024.