Hi,
Thanks for the interest in our plugins.
Unfortunately, we do not have a direct registration feature.
You could use Evenbrite and set it up as a Free Event using our plugin.
I have found this plugin that may work for registration as well, but it is not supported by us.
https://github.com/GlynnDevins/The-Events-Calendar-Registration
And the price does not include Sales Tax and prices are in USD.
Let me know if you have any follow up questions.
Thanks