File Necessary Forms: File IRS Form 5500 every year to report the plan's status and compliance. Employee Stock Ownership Plan (ESOPs).The Retirement Office is responsible for managing investments and retirement benefits for Allegheny County Employees' Retirement System (ACERS) Plan members. Retirement and Benefits. Application for Retirement(PDF, 316KB) – includes a listing of all forms necessary to apply for retirement. The Allegheny Group can help you achieve your financial goals. Learn about Retirement, Investing, Family, Business Planning, and Philanthropy. Information on retirement plans for small businesses and the selfemployed. Choose a Plan, Maintain a Plan, Find or Fix Plan Errors, Plan Benefits. Explore your options and find a tax-advantaged small business plan as a self-employed professional, entrepreneur, or business owner.