Diamond Accounting and Income Tax Inc. is a locally owned and family operated accounting and tax firm based in Jackson, Michigan. The firm works with small businesses, households, individuals, corporations, and partnerships across Jackson and surrounding Michigan areas, including Hillsdale, Calhoun, Ingham, Washtenaw, and Eaton.

Its services include tax planning and income tax preparation, bookkeeping, accounting, payroll, sales tax support, IRS notice and audit help, and new business formation. The firm also offers QuickBooks setup and can support clients in person or remotely, including out-of-town clients using mail-in tax forms.

Source details describe the practice as operating since 1958, with over 55 years of experience and year-round service by appointment.