I have granted all Members of the SonarCloud the following permissions:
Quality Gate
Quality Profiles
Plus, according to the documentation and this community
Members should have the ability to add tags.
However, Members have reported that they cannot add tags to a sonarcloud project. I have asked the user to log in and out; however, that did not grant the user the ability to add a tag.
Only project administrators (project-level Administration > Permissions) can edit tags on a project, as they are visible to all users who have access to that project.