Hollander CPA Group LLC is a Saint Charles, MO accounting firm serving businesses and individuals. The firm provides financial, tax, and accounting services, continuing a tax and accounting service history associated with St. Charles Data Processing.

Its work includes tax preparation and planning for business and individual clients, along with financial statement preparation, bookkeeping, payroll services, and QuickBooks assistance. The firm describes its role as accountants and advisors, with services organized around practical accounting support and tax needs.