Toronto chartered accountants DCY Professional Corporation Chartered Professional Accountants provide accounting, consulting and tax preparation services for dental and health care professionals throughout Ontario. DCYPCCPA, works on the tax issues and financial security of clients, allowing them to practice their profession without distraction. Choosing the right accountant is one of the most important decisions you will make for your business. In order to compete effectively in today’s challenging business world, you need a chartered accounting firm that is dedicated to becoming an integral part of your dental or healthcare organization.