Within each Teamwork product, you can enable Teamwork Spaces for your site through the site settings.
In Teamwork, select the Integrations tab in your site settings.
You will see an option for Teamwork Spaces in the list of integrations. Click Connect to enable it for your site.
You can also enable Teamwork Spaces through your Teamwork product switcher.
In Teamwork Desk, go to the Apps section of your site settings and click Enable under the Teamwork Spaces option.
You can also enable Teamwork Spaces through your Teamwork Desk product switcher.
Note: Enabling Teamwork Spaces from one of your other Teamwork products will automatically initiate the 30-day trial period.
For more information, see: Understanding User Permissions and Access