You can rename a tag at any time. You will need the existing tag_name to make this call successfully.
Please note, if you rename a tag the tag will be renamed on all associated shipments.
PUT /v1/tags/:tag_name/:new_tag_name
PUT /v1/tags/east_warehouse/west_warehouse HTTP/1.1
Host: api.shipengine.com
API-Key: __YOUR_API_KEY_HERE__If successful, you will receive a HTTP 204, (No Content) response.