The following settings must be configured in order for the Shopify integration to work:
Setup Stock Mapping
Click on "Stock By Mappings" link to map your SureDone stock fields to Shopify inventory locations.
Select default Collection and Location
Navigate to the plugin settings page. Refresh your "Collections" and "Locations" settings, which will import these values from Shopify and allow them to be mapped.
Select a collection to be your default place products get placed when they sync from SureDone to Shopify.
Select a location in order for stock amounts to be synced, but what location they are synced to is controlled by the Stock By Mappings above.