The California Franchise Tax Board announced today that they mailed out 135,000 audit letters to taxpayers suspected of erroneously claiming Head of Household status on their 2010 tax returns. A similar audit campaign last year resulted in additional assessments exceeding $35 million. People use Head of Household status because of the tax savings, but few really understand how it works. To qualify, the taxpayer must provide care for more than one-half of the year and pay more than one-half the cost of maintaining their home. The qualifying person must be related to the taxpayer and meet the requirements to be a qualifying child or relative.