Accounting and Tax Services is a family-owned and operated CPA firm with roots going back over four decades. We specialize in making tax and accounting genuinely accessible — whether you're an individual filing your first return, a small business owner managing payroll, or a family navigating the college financial aid process. We are not a national chain. We are your neighbors in Irvine, and we treat your finances the way we treat our own.

40+
Years of Combined Tax Experience

2
Licensed Certified Public Accountants

1982
Year the Firm Was Founded

OUR TEAM
The People Behind ATS

Sitara Mamdani

CPA & co-founder

Co-founder of the firm with over 40 years of tax experience. B.S. in Business Administration from the University of Redlands. Specializes in tax saving strategies for individuals and small businesses.

Tazin Mamdani Yunis

cpa

Joined the firm in 1999 with 25+ years of experience in individual, corporate, and small business taxation. Dual B.S. degrees from UC Irvine and an MPA from NYU. Fluent in Spanish.

Shazad Yunis

ctec registered

Joined in 2017 after a 20-year Engineering career. Brings analytical precision to individual and small business tax preparation. B.S. in Mechanical Engineering. CTEC Registered Tax Preparer.