This question already has an answer here:
- Kill the Retag option, use just Edit 5 answers
Here I read,
When you have 500 reputation, hovering to the right of the tags list will reveal "edit tags" link - this will allow you to retag questions without any approval required.
I had earned edit tag privilege few days back (my stackoverflow reputation is 735 now). Now it seems, I lost the privilege. But didn't get any notifications regarding it. What could be the reason?