In order to import/update customer addresses, please, use the following fields:
Root Entity
Customer Address Entity
Here are some useful tips on how to locate the ID values for the import file:
1) entity_id
ID of the customer available in the URL of the customer's page.
2) customer_address_entity.entity_id
The value can be checked in the 'customer_address_entity' table. If you'd like to create a new address entity, locate the last one and insert in the import file the value higher.
3) customer_address_entity.parent_id
ID of the customer available in the URL of the customer's page.