Turning Tag Import back on?

So, a while ago I turned the tag import off because it was cumbersome to deal with. I now would like to turn it back on. The problem is, I have NO IDEA how I turned it off in the first place so I don't know how to turn it back on.

I checked on the metadata plugins and they're all set to download tags but they're not.

Any thoughts on what I might have done and how I can undo it?

Thanks!