You can print the USPS, UPS and FedEx labels right in SureDone from your printer.  This will also send the shipping prices to SureDone so you can calculate the shipping on the Orders > Invoices screen for each individual customer order.  

To use SureDone for shipping - you just need to set up the API information for each carrier:

1. Go to Settings > Shipping > Carrier Settings

2. For FedEx follow the steps in this guide:

3. For USPS and (needed for USPS integration):

4. For UPS: