All of the following forms must be completed and returned to the Retirement Office for your application to be processed. Application Forms (must be completed).The Department of Aging administers all aging programs and services for older Pennsylvanians across the commonwealth. For questions or assistance with completing the application, please call the County Treasurer's Office at 412-350-4100 or toll free at 1-866-282-8297. Gov website belongs to an official government organization in the United States. ACT 77-SENIOR CITIZEN TAX RELIEF APPLICATION. Employees enjoy some of the best health, vision, dental, and life insurance and retirement benefits in the region. Allegheny. Allegheny County Assistance Office Headquarters Piatt Place 301 Fifth Avenue, Suite 470. Pittsburgh, PA 15222. In addition to this form, you should complete Forms 85 (Direct Deposit - Electronic Funds Transfer Sign-Up) and 766.