Yesterday, I added one tag to this question, but I didn't get the Organizer badge.
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
Jeff is still working on implementing the ability for the server to see into the future.
It should be coming soon, but until then, you're probably going to wait until a few minutes or maybe an hour after the your re-tag actually happens.
Edit: After looking at your question and account, I think you have misunderstood what the organizer badge is.
It is for re-tagging other people's posts, not your own. This can be done after you've reached 500 rep.