Accounting, Bookkeeping, Payroll, Taxes and Business Management Services

Quantum Accounting Tax Group is a Riverside County, Orange county firm serving clients throughout Southern California that provides a wide variety of business accounting, bookkeeping, tax preparation and financial management services.

Providing the highest quality of service for the least possible cost! We believe in the value of relationships!

When you choose Quantum Accounting Tax Group, you can benefit from our very best acumen and thinking...

Did you know? Helpful tax information you can't ignore...

An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the Internal Revenue Service. It is a nine-digit number that always begins with the number 9 and has a range of 70-88 in the fourth and fifth digit. Effective April 12, 2011, the range was extended to include 90-92 and 94-99 in the fourth and fifth digit, example 9XX-90-XXXX.

IRS issues ITINs to individuals who are required to have a U.S. taxpayer identification number but who do not have, and are not eligible to obtain a Social Security Number (SSN) from the Social Security Administration (SSA).

ITINs are issued regardless of immigration status because both resident and nonresident aliens may have a U.S. filing or reporting requirement under the Internal Revenue Code.

Individuals must have a filing requirement and file a valid federal income tax return to receive an ITIN, unless they meet an exception.

services & locations

Quantum Accounting Tax Group provides a wide variety of business accounting, bookkeeping, tax preparation and financial management services. Serving clients throughout Southern California, including but not limited to Riverside, California, the greater Inland Empire, Orange County and San Bernardino County areas. Our clients are located in the cities of Riverside, Corona, Chino Hills, Temecula, Lake Elsinore, San Bernardino County, Inland empire, Anaheim, Aliso Viejo, Buena Park, Fullerton, Costa Mesa, Garden Grove, Irvine, Tustin, Santa Ana, Orange, Lake Forest, Laguna Hills, San Juan Capistrano, San Clemente, Yorba Linda and surrounding cities in Los Angeles County, Long Beach, Sherman Oaks, Woodland Hills and more...