Why Contact a CPA? The Knowledge  --  A CPA will understand the "why" behind your taxes, and can help save you money through tax planning. Continuing Professional Education  --  A licensed CPA is required to meet strict education standards.  Over a three year period, a CPA must log 120 hours of advanced professional education.  These requirements ensure that a CPA stays abreast of all legislative developments. Standards  --  Illinois CPAs are governed by the Illinois CPA society as well as the American Institute of Certified Public Accountants (AICPA).  These societies enforce strict codes of conduct and ethical guidelines.  The Exam  --   Most people agree that the CPA exam is one of the most difficult entrance exams for any professional society.  Passing the rigorous, four section test demonstrates competencies in financial accounting, governmental accounting, law and tax.