How to bulk delete a specific tag? I entered wrong transactions and need to start over. Goal is to remove the tags so the transactions go back into "All Untagged"?

I am hoping that once back in untagged, then I can just check the boxes to re-tag. I have already removed the tag group and created a new one but the existing tags themselves need ti be removed from original transactions that I ungrouped. If not possible, can you tell me how to manually delete tags? THANK YOU!!!!