Former 15-Year IRS Official now serving Clients for Business Transactions, Tax Plannings and Tax Controversies at IRS & Tax Courts. Since 2016, Advocating & Litigating for Nationwide Clients at Immigration Courts and USCIS Litigating at California Family Courts. Enn Luo is a California attorney, who specializes in federal tax litigations and controversies. During her 15 years with the IRS, she was a revenue agent at small business and self employed, then at large business and international divisions. Subsequently, she became an appeals officer, who settled docketed and non-docketed tax cases.