As soon as you link your Amazon store to Circle.us, your seller fulfilled orders including Prime orders can be downloaded to Circle.us system automatically.
You can select the Prime orders and create labels with UPS, FedEx or USPS services.
The tracking numbers will not be uploaded to your Amazon store automatically. So after you create label from Circle.us system, please go to Amazon Seller Central to update tracking number manually. There is a leverage given for seller’s to ship 5% of the orders outside of Buying shipping. If your orders exceed the limit, you would not able to update tracking number manually.
Please feel free to contact us if you still have any problem.