Buying Shopify Shipping labels
Depending on your fulfillment locations, you can purchase labels from the following carriers through Shopify Shipping:
If your fulfillment locations is eligible for Shopify Shipping, then you can buy shipping labels when you're fulfilling an order in Shopify.
If your fulfillment locations aren't eligible for Shopify Shipping, then use a shipping label app instead.
You can buy shipping labels individually or in bulk. After you buy a shipping label, you can print or void it. If your default location is in the United States and your business accepts returns, then you can also create and send return labels in your Shopify admin.