CiviCRM Community Forums (archive)

If you mean importing the Tag values that you can use to assign to contacts - there's no user interface import. However, they're stored in a simple table so you could probably use a SQL query to do it (civicrm_tag). Make sure and assign the correct domain_id value (1 b default - unless you've got multiple domains).

The civicrm_entity_tag table joins (assigns) tags to contacts or other "entities" (altho only contacts can be tagged in the UI for now). If you're adding rows to civicrm_tag, that won't affect existing data in civicrm_entity_tag. If you're deleting/replacing tags, then you'll want to / need to delete existing assigned tags (delete from civicrm_entity_tag) - else you'll get foreign key errors.