Removed Temporary URL part

app/helpers/license_helper.rb

@@ -67,9 +67,12 @@ module LicenseHelper
     uri.to_s
   end
 
-  # Temporary URL for promotions - later `group_billings_path(group)` or `profile_billings_path`
   def upgrade_plan_url
-    'https://about.gitlab.com/gitlab-com/'
+    if (@project.owner.present? && @project.owner == @current_user) 
+      profile_billings_path
+    else @project.group&.has_owner?(@current_user)
+      group_billings_path(@project.group)
+    end
   end
 
   def show_promotions?

app/views/shared/promotions/_promotion_link_project.html.haml

@@ -7,7 +7,11 @@
     - owner = @project.namespace.owner
     %p Contact owner #{ link_to(simple_sanitize(owner.name), user_path(owner)) } to upgrade the license.
 - elsif current_user.admin?
-  = link_to License.current&.expired? ? 'Buy GitLab Enterprise Edition' : 'Start GitLab Enterprise Edition trial', new_trial_url, class: 'btn btn-primary'
+  = 'URL ' + upgrade_plan_url
+  - if License.current&.expired?
+    = link_to 'Buy GitLab Enterprise Edition', Gitlab::SUBSCRIPTIONS_PLANS_URL, class: 'btn btn-primary'
+  - else
+    = link_to 'Start GitLab Enterprise Edition trial', new_trial_url, class: 'btn btn-primary'
 - else
   %p
     Contact your Administrator to upgrade your license.