To enable real time shipping rates from Easyship in your Checkout through BigCommerce, please follow the below guide. This will allow you to shop the Cheapest, Fastest and Recommended shipping solutions for your customers orders in your Store Checkout process.
First - Go to "Store Setup > Shipping" under Checkout Shipping Options, and click on 'Edit' for the zones you want to enable Easyship shipping rates for
Second - In "Store Setup > Shipping" Under Real-time shipping quotes, toggle Easyship to be active.
Third - Click on 'Submit' and then repeat these steps to enable Easyship for any additional or new shipping zones you wish to setup
Once updated, live rates will be visible to your customers during the checkout process.
Fourth - Setup your checkout settings such as Free Shipping, Calculated Taxes and Duties, Default Category from the Easyship dashboard, detailed in this article: Checkout.