You can use the formulas below in the Calculated Fields to export tracking info of Shopify Order Returns at the order level or line item level:

Order Level

Returns Tracking Numbers

get_attribute_value(get_attribute_value({{ returns }}, "tracking", return_raw_results=True), "number")

Returns Tracking Carrier Names

get_attribute_value(get_attribute_value({{ returns }}, "tracking", return_raw_results=True), "carrier_name")

Returns Tracking URLs

get_attribute_value(get_attribute_value({{ returns }}, "tracking", return_raw_results=True), "url")

Line Item Level

Lineitem Returns Tracking Numbers

get_attribute_value(get_attribute_value({{ line_items.returns }}, "tracking", return_raw_results=True), "number")

Lineitem Returns Tracking Carrier Names

get_attribute_value(get_attribute_value({{ line_items.returns }}, "tracking", return_raw_results=True), "carrier_name")

Lineitem Returns Tracking URLs

get_attribute_value(get_attribute_value({{ line_items.returns }}, "tracking", return_raw_results=True), "url")

If there are multiple tracking data, the values will be separated by a comma.

Example Output:

Shopify Admin View: