First, I should say I am very new to sonarqube. My question is that we are two different teams using the same sonarqube panel for our projects so we defined different projects but I couldn’t find a way how can I create new rulesets for our project because we don’t want to change other team’s ruleset. is there any solution for that?
we are using * Community Edition * Version 9.2.3
Did you review the documentation from the other thread?
Yes but I couldn’t find any clue about when the projects are in the same panel if I can have different rulesets and if the answer is yes how! 
What do you mean “in the same panel”?
well As you can see on this screenshot we have for example 3 projects 1, 2 and 3 but there is only one rules tab on the top of this panel and I want these three project have their own customized rulesets.
Quality Profiles define the set of rules that apply to a project, and different Quality Profiles can be applied to different projects.
Have you tried creating a new Quality Profile?
Oh I see. so I can choose from the default ruleset in a quality profile then assign it to different projects?
Thank you So much Colin for guiding me 