Dieck, Arenas and Associates, PC is a certified public accounting firm based in Waukegan, Illinois. The firm serves families, individuals, and small businesses across northern Illinois and southern Wisconsin, with source materials describing four certified public accountants supported by dedicated office staff.

Its work includes tax preparation and accounting, tax planning, bookkeeping, payroll, sales tax, IRS notice and audit help, and new business formation. The firm also describes services for trusts, estate planning, retirement planning, consulting, advisory work, planning, and compliance activities for business and individual clients.

Source materials note Spanish language support and describe technology systems used for online tax filing, record access, and client interaction. Services are listed for in-person and remote formats in the supplied profile facts.