Here are the steps you need to take to connect your Shipstation account to your WorkMagic profile:
Navigate to Settings > Integrations > Cost Settings
Review the terms and conditions and click "Next".
Enter your Shipstation API configuration (API key and API secret)
If you need help on how to generate your Shipstation API key, please refer to their documentation: https://help.shipstation.com/hc/en-us/articles/360025856212-ShipStation-API
Click Confirm
You have successfully connected your Shipstation account.