For over 50 years, Capital Business Service, Inc. has been and is Napa Valley's most established tax and bookkeeping service that utilizes the latest in electronic solutions to resolve tax and bookkeeping requirements for our clients!. Capital Business Service,Inc. located in Napa,CA provides the following tax filing,tax preparation and tax resolution services for individuals and corporations throughout Napa County: Personal 1040,1040A and 1040EZ tax preparation services Corporate Tax Preparation and tax filing services in Napa,CA Bookkeeping Services Year-round Tax Advice by Certified Tax Advisors