20% discount for first-time tax return preparation or tax planning services. Offer Valid: 09/21/2015 - 12/31/2025 20% discount for first-time tax return preparation or tax planning services. Cornerstone Associates Cornerstone Associates 1056 Charles Orndorf, Suite H Brighton MI 48116 This Member To Member Deal is promoted by Greater Brighton Area Chamber of Commerce. Share × Print Email Facebook Twitter LinkedIn Pinterest Tell a Friend ×