If you mean un-tagging a page, you vote down its relevance by hovering over the tag on the page and clicking the < arrow. If the relevance score gets to or below 0, the tag is removed.
If you mean deleting a tag entirely (not just from one page), I think you’d have to message the EA Forum team?
Sorry if offtopic but how do I remove a tag after wrongly using it?
If you mean un-tagging a page, you vote down its relevance by hovering over the tag on the page and clicking the < arrow. If the relevance score gets to or below 0, the tag is removed.
If you mean deleting a tag entirely (not just from one page), I think you’d have to message the EA Forum team?
More info on tags here and here.