Hi @LR21,

Thanks for reaching out to the community!

The Shopify to Klaviyo integration is , for the most part, a one way integration. This means that Shopify pushes data to Klaviyo but Klaviyo does not push data to Shopify.

With that being said, there is one setting in the Shopify integration with Klaviyo that does allow for two way syncing (Klaviyo to Shopify) for 3 Klaviyo fields - first name, last name, email address. Here is our help center article on How to Sync Fields from Shopify to Klaviyo.

Have a nice weekend!

Julie