According to this article , Relationship tabs are indexed with RelationshipType ID. That means RelationshipType ID is Relationship tab ID. And also, Relatioship tabs are a part of Item window. Therefore, the first step is to get Item window reference. it could easily get with below code: var thisWnd = aras.getMostTopWindowWithAras(window); Enable/Disable Use below code can enable/disable a tab. The parameter "Enabled" is a Boolean, the tab will be disabled if passing false. thisWnd.relationships.relTabbar.SetTabEnabled( RelationshipType ID , Enabled ) Visibility Use below code can control the visibilty of a tab. The parameter "Visible" is a Boolean, the tab will hide if passing false. thisWnd.relationships.relTabbar.SetTabVisible( RelationshipType ID , Visible ) Remove Use below code can remove a tab, but this action is irreversible. thisWnd.relationships.relTabbar.RemoveTab( RelationshipType ID , Item Type )