Within Teamwork Projects, you can choose which features you want to enable on each of your projects.
Select your project's Settings tab, or click the options (three dots) button to the right of the Overview tab, and select Settings from the dropdown menu:
In the Settings area, you will see a project features section. Here, you can toggle on/off each of the features.
Note: Once a feature is disabled in the project settings, it is removed for all users on the project. The tab for that feature will no longer be visible in the project's navigation menu.
For more information, see: Project Notification Settings