Can I buy and print USPS labels from WCart?

Not yet. The USPS Labels menu item is a coming-soon placeholder and is hidden from the sidebar for now.

The USPS integration in the Shipping Carriers plugin supports rates and tracking only. Buying a USPS label needs a funded USPS payment account, which WCart doesn't connect to yet. Its setup asks for a Consumer Key, Consumer Secret and Ship-From ZIP Code, plus optional Price Type, account and Mail Classes fields.

Because USPS can't create labels, it doesn't appear in an order's Fulfilment & Tracking panel, which only lists label-capable carriers. For now:

1. Buy the label in your USPS account.
2. In WCart, set the order's status to Shipped so the customer is told it's on its way.

If you need labels created from WCart, UPS and Envia support labels and tracking.