How do you add a tag?

I was trying to post a topic on the discussion category but it gave me this message:


Where can I add tags? I can only see the section where I can choose the category. I wasn’t sure if I’m missing something. So far, I able to post in the off topic section without tagging.


when you create a new topic there should be a drop-down for tags?

I don’t get any option for optional tags:

(Running in Firefox v123 on Fedora Linux)