- post a questionpost a question on Meta Super User about it.
- tag your question with both discussion and tag-cleanup-request
- explain in the post why the tag should be removed or be replaced with another tag
You can also have a look at all questions about tags that are waiting to be accepted for cleanupquestions about tags that are waiting to be accepted for cleanup.
Great! Have a look at the questions about tags that are accepted for cleanupquestions about tags that are accepted for cleanup. The questions will have all the information on how to proceed with the tag (removal or replacement). You can open the list of questions with that tag and start editing them.
In case you have any questions, post a comment in the question about the tag, post a new questionpost a new question on Meta Super User or visit the chat and talk about it with other users.