Normally, if you've just created a tag, you can rename it by editing the question(s) that have it to remove the misspelled tag name and adding the correct tag name. There's no way to explicitly delete the old tag name, but once a tag is not present on any question, it will disappear after a day or so (there's a daily cleanup job).
If the tag is already present on many questions, that would be a different matter requiring a meta discussion. If the outcome of the discussion is to rename the tag, moderators have a tag renaming tool that doesn't bump questions.
There's an exception: if the old name and the new name differ only in the placement of hyphens or in a final
s, the system will prevent you from creating the new name. This is because of a general rule that prevents having two tags that differ only in the placement of hyphens or a tag that looks like the plural of another. That's why you were referred to meta. In this case (missing hyphen, misplaced hyphen, extra hyphen), since the fix is clear and doesn't need community discussion, you can flag and ask a moderator to do the renaming.