Advanced Accounting & Taxation Services are a Public Accounting firm based in Hornsby; servicing Cherrybrook and the North Shore, New South Wales. Providing professional accounting, taxation and business advisory services. Your local, reliable accounting and tax advisor. AATS believes in building long-lasting business relationships working one-on-one to manage every wave of business growth. Specialists in small business, start ups and moving to the next level for growing business, delivering high quality business and taxation advice on a range issues of concern to all businesses.