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14 reviews

Claremont based Corina L Christiansen, CPA, has been around the accounting profession since she was 15 years of age. She started by answering calls for her grandfather in his bookkeeping and income tax service known as Williams Bookkeeping and Income Tax Service.

Her Grandfather Williams started the business in 1962, and her father Carroll took over in 1976. Corina succeeded her father in 1994 and she updated the name of the accounting practice to Christiansen Accounting.

Corina studied at Cal Poly Pomona, where she received her BS in Accounting. She became a CPA as an auditor at KPMG, an international accounting firm. Her industry experience includes working in the internal audit and finance departments of a private global manufacturer of electronic components.

Corina loves working with small business owners and her expertise includes small business tax preparation for individuals, partnerships, corporations, trusts and LLCs, as well as tax planning for individuals and business.
Service Lines
Tax Preparation
Tax Planning
Business Consulting
Payroll & HR
Tax Problems
Tax Preparation
Industry Focus
Doctors and Medical Professionals
Fire & safety
Doctors and Medical Professionals
Law enforcement
Realtor & Real Estate Professionals
Lawyers & Attorneys
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14 reviews
5.0 08/02/2021
Amazing experience! Very kind and informative! I will always trust my taxes with this firm! Saved me a lot of money! Corina has been super helpful in always answering my questions and being punctual in everything she does.
5.0 04/01/2021
Corina is very knowledgeable and professional. We trust her with all of our tax business and have recommended her to all of our friends and family. Her office staff are very friendly and a pleasure to speak to.
4.8 06/12/2020
Corina and her associates at Christiansen Accounting are wonderful to work with and are quite knowledgeable and trustworthy. I highly recommend them!
5.0 05/02/2018
Corina has been great to work with. I have been going to Corina for a few years - the impetus was to find a CPA to help us through our retirement years. She has taken care of all of our needs and she is always available to answer any questions that I may have. She is professional and friendly. I enjoy just visiting and chatting with her! Her staff is great too! I highly recommend the services of Corina and Christiansen Accounting.
5.0 03/12/2018
All of our tax issues and questions have always been handled professionally and promptly by Corina and the staff at Christiansen Accounting
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