University of Virginia School of Law, J.D.
  • Virginia Tax Review, Executive Editor
George Mason University, B.S.
  • with distinction; Weber H. Peterson Award for Economics

Prior Employment

  • State of Michigan, Commissioner of Revenue, 1999-2002
  • Heller, Ehrman, White & McAuliffe, Attorney
  • Brobeck Phleger & Harrison, Attorney
  • Washington, D.C., Director of Multistate Tax Commission Nexus Program

Bar Admissions

Court Admissions

Professional Affiliations

Paul J. Hartman Memorial SALT Forum, Board of Trustees, February 2002-present

BNA State Tax Board, September 2002-present

Michigan Supreme Court Advocates Guild, 2013-present

Streamlined Sales Tax Project, April 2000-July 2002

Direct Marketing Association, Negotiations Advisor, November 1996-November 1997

American Bar Association

  • Litigation Committee, Tax Litigation Subcommittee, Newsletter Co-founder and Editor, 1989-1996

California Bar Association, Taxation Section

  • Executive Committee, 1989-1992

San Francisco Area Women Tax Lawyers

  • President, 1993-1995
  • Vice President, Membership, 1991-1992

California Education of the Bar Tax Advisory Board, 1990-1994

Bar Association of San Francisco Tax Section Executive Committee, 1994-1995

News & Resources


Ms. Haas is a tax attorney with significant experience advising clients on a nationwide basis on multistate tax strategies, resolving tax disputes and litigating state tax cases. She focuses her practice on managing state income, value-added, sales and use tax, property tax and unclaimed property issues for multinational corporations.

  • Focuses on nationwide state tax projects, including negotiations with the Direct Marketing Association on use tax collection simplification and the Streamlined Sales Tax Project
  • Nationally recognized for knowledge on issues relating to state jurisdiction to tax, also known as nexus
  • Experience with emerging e-commerce state tax issues and the tax issues arising in online transactions
  • Counsels clients on planning techniques aimed at preventing double taxation and discriminatory taxation of multinational companies


  • Served as Michigan's Commissioner of Revenue for three years, during which time she administered 23 taxes, managed an 800 person tax revenue operation and advised the governor and treasurer on tax policy
  • Taught nexus seminars to accountants and lawyers in all 50 states, and served for three years as Director of the Multistate Tax Commission Nexus Program
  • Worked with the revenue commissioners in 49 states on issues of national impact


Wharton Center

  • Board of Directors, 2011-present

Citizens Research Council of Michigan

  • Board of Directors, 2013-present

Michigan Chamber of Commerce

  • Board of Directors, 2008-2013
  • Tax Policy Committee, Chair, 2007-2008


  • Board of Directors

Lansing Chamber of Commerce

  • Women's Interest Network, Founding Member, 2008-present
    • Board of Directors, 2008-2010

News & Resources


Press Releases


Seminars & Events


  • State Tax Notes, January 2010 
    • Named to "The All-Decade State Tax Team"
  • The Best Lawyers in America, 2006 and 2007, 2012-2016
    • Named 2014 Lansing Tax Law "Lawyer of the Year"
  • Michigan Super Lawyers, 2007-2013 and 2015
    • Named as one of the Michigan Super Lawyers Top 50 Women, 2007
  • Martindale-Hubbell AV® Preeminent™ Peer Review Rated

Academic Appointments

  • Adjunct Professor, Thomas M. Cooley Law School, January 2001-present
  • Instructor, Multistate Tax Commission Nexus School, January 1996-2002