We currently do not offer the ability to edit tags. The easiest way to replace an existing tag is:
1. Create your new Tag
2. Create a Smart View, OR use Advanced Search, to identify all Issues using the old Tag
3. Select all Issues in that search, then use Bulk Actions to tag all of those Issues with your new tag
4. Archive the old tag by navigating to the ‘Active Tags’ page and clicking the ‘Archive’ button next to the tag
Please note: tags that already exist in Archived or Active Tags area cannot be added again. To reactivate an archived tag, simply click the Reactivate button next to the tag on the Archived Tags page.