Just as a kind of mini cheat sheet for using git tags:

Adding a tag:

• git tag tag_name
• git tag
  Should show your new tag.
• git push origin --tags or git push origin :tag_name
  Because git push doesn't push tags.

Removing a tag:

• git tag -d tag_name
• git tag
  Should no longer show your tag.
• git push origin :refs/tags/tag_name
  Because git push --tags doesn't push deleted tags.

Hope that helps.