Thanks for using our plugins. I can help out here.
Currently we do not have a feature to support Tags in Community Events.
If you think that is something you would like as a feature I encourage you to visit our User Voice Page and either upvote an existing request or make a new request there.
We’re happy to announce you can now allow users to add Tags to their events when submitting them to your site.
Don’t worry, they won’t be able to go crazy and add 80 million new tags on your site – in the same way categories work, users can only add existing tags that an admin has created to their event. And if you wish to remove Categories and Tags from the event submission form, you can do so with simple customizations.