Diane DeLeon CPA PLLC is an Oro Valley, AZ accounting firm serving individuals and business clients with tax and accounting support. The firm works with small businesses, executives, independent professionals, and law firms, offering services that help clients manage tax obligations and ongoing financial administration.

Its listed services include individual and business tax preparation, tax planning, accounting, bookkeeping, payroll, and related tax services. The source also notes outsourced CFO services and a secure client portal for valued clients, along with resources such as refund information, newsletters, and state tax forms.