Good day, @rjudge.
Thanks for letting us know about your interest in this feature. You can check the postage rates by contacting the shipping companies like UPS, USPS, and FedEx. With QuickBooks Shipping Manager, you can process shipments and print FedEx, UPS, and USPS labels from within QuickBooks. You can even schedule pickups and track packages right in your QuickBooks.
You can find their contact information in this article: Intuit QuickBooks Shipping Manager. This includes the details of how you can set up Shipping Manager with the shipping companies and other important offers and pricing details.
Please let me know if you have other QuickBooks concerns. I'll be around to help. Have a good one.