- Monday–Friday, 8:30 a.m.–5:30 p.m.
- Tel: 213-738-6000
- Fax: 213-738-6062
- Email: [email protected]
- 3435 Wilshire Blvd Suite 600, Los Angeles, CA 90010
ByungChan Ahn, CPA
Founder & Managing Partner
More Than Three Decades of Accounting and Tax Experience
Mr. Ahn has more than three decades of experience in accounting and tax matters and has led ABC CPAs since its founding in 1993.
He advises businesses, organizations, investors, and individuals on accounting, tax, audit, multi-state, cross-border, and business transaction matters.
More Than Three Decades of Accounting and Tax Experience
Mr. Ahn has more than three decades of experience in accounting and tax matters and has led ABC CPAs since its founding in 1993.
He advises businesses, organizations, investors, and individuals on accounting, tax, audit, multi-state, cross-border, and business transaction matters.
- Accounting and financial reporting
- Federal, state, local, and multi-state tax compliance
- Audit, review, and compilation services
- Bookkeeping, monthly accounting, and full-service payroll
- Tax audit support, cross-border services, M&A, and due diligence
How We Work
Professional Experience / Coordinated Support
Clear Communication
/ Long-Term Client Relationships
How We Work
Professional Experience / Coordinated Support
Clear Communication
/ Long-Term Client Relationships
Our Services
ABC CPAs assists businesses, organizations, investors, and individuals with accounting, tax compliance, financial reporting, payroll, tax authority matters, and business transactions. We also support U.S. subsidiaries and foreign-parented businesses with U.S. accounting, tax, multi-state, and cross-border requirements.
Our Services
ABC CPAs assists businesses, organizations, investors, and individuals with accounting, tax compliance, financial reporting, payroll, tax authority matters, and business transactions. We also support U.S. subsidiaries and foreign-parented businesses with U.S. accounting, tax, multi-state, and cross-border requirements.
Assurance Services
Audit, review, and compilation services for lenders, investors, boards, regulators, grantors, management, and other financial statement users.
Tax Compliance and Advisory
Federal, state, local, business, individual, multi-state, and cross-border tax compliance and advisory services.
Estate, Gift, and Succession Tax
Tax planning and compliance involving gifts, estates, inheritances, family wealth transfers, business ownership, and U.S.–Korea cross-border matters.
Employer Tax Compliance
Payroll withholding, unemployment insurance, local employer taxes, employee work locations, and related federal, state, and local compliance.
Tax Audits and Appeals
Support with IRS, state, and local tax notices, examinations, document requests, proposed adjustments, protests, and administrative appeals.
Specialized Tax Advisory
Accounting and tax analysis involving entity and ownership structures, related-party transactions, acquisitions, sales, investments, and other significant transactions.
Accounting and Bookkeeping
Bookkeeping, reconciliations, account review, adjusting entries, monthly financial statements, and year-end accounting preparation.
Payroll Services
Full-service payroll processing, employee and contractor payments, payroll tax filings, reporting, and related compliance support.
Business Advisory, M&A, and Due Diligence
Accounting, tax, and financial support for business owners, buyers, sellers, and investors involved in acquisitions, sales, financing, ownership changes, and business transitions
Multi-State Tax and Compliance
ABC CPAs supports clients with multi-state operations across the United States, including state tax, sales tax, payroll, employee-location, nexus, registration, and filing matters.