business advisory and consultancy services relating to tax accounting methods, bankruptcy, business restructuring, controversies; accounting for income taxes, mergers and acquisitions, operational consulting, property tax consulting, tax refund reviews, Sarbanes-Oxley compliance, site selection and negotiated incentives, tax due diligence and unclaimed property; tax compliance services; tax advisory services; tax advisory services in the nature of researching state tax credits available to offset corporate income tax; and tax advisory services concerning economic development incentives available to companies