Adam P. Beckerink


  • Adam P. Beckerink
  • Phone: +1 312 499 6741

    Import to Address Book

  • Duane Morris LLP
    190 South LaSalle Street, Suite 3700
    Chicago, IL 60603-3433

Adam P. Beckerink leads the State and Local Tax group. Mr. Beckerink represents multinational corporations and high-net-worth individuals in tax disputes, controversies and litigation with revenue authorities throughout the United States. His practice spans all aspects of the tax planning and dispute resolution process, including audit, litigation and appeals in matters including state False Claims Act tax defense, state tax refund class action defense, individual residency, telecommunications excise tax, and sales and income tax.

Through both litigation and settlement, Mr. Beckerink has resolved difficult state tax matters before administrative appeal boards, tax tribunals and courts in Illinois and throughout the United States. He advises diverse U.S.- and non-U.S.-based multinationals on all aspects of state income, franchise, sales and use tax and unclaimed property issues, including nexus, business/nonbusiness income, unitary business principles and U.S. constitutional concepts.

Mr. Beckerink also counsels on multistate and federal tax planning and the tax aspects of mergers and acquisitions. He has published numerous articles on tax law and is a frequent speaker on a broad range of state and local tax issues. Mr. Beckerink is also active in pro bono work, representing veterans before the U.S. Department of Veterans Affairs.

Mr. Beckerink is a graduate of the Georgetown University Law Center (LL.M., 2006), the University of Maryland School of Law (J.D., 2004) and Shenandoah University (B.A., 2001).


  • Illinois
  • Maryland
  • District of Columbia


  • Georgetown University Law Center, LL.M., Taxation, 2006
  • University of Maryland School of Law, J.D., with honors, 2004
  • Shenandoah University, B.A., 2001


  • Duane Morris LLP
    - Partner, 2022-present
  • Morgan, Lewis & Bockius
    - Partner, 2018-2022
  • Baker & McKenzie LLP
    - Partner, 2016-2018
  • Reed Smith LLP
    - Associate and Counsel, 2011-2016
  • Bryan Cave LLP
    - Associate, 2008-2011

Professional Activities

  • Council on State Taxation

  • Institute for Professionals in Taxatin (IPT)

  • Massachusetts Taxpayers Foundation

  • Taxpayers Federation of Illinois

  • Tax Executives Institute

  • American Bar Association
    - State and Local Taxes Committee
  • Law360 U.S. Editorial Advisory Board, 2019

  • Chicago Tax Club

  • Chicago Bar Association
    - State and Local Tax Committee
  • Illinois State Bar Association
    - State and Local Tax Committee
  • Illinois Chamber of Commerce
    - Tax Institute

Honors and Awards

  • Thomson Reuters Stand-out Lawyer, 2024
  • Listed in The Legal 500, 2019

  • Acristas Star Attorney (nominated by client)

Representative Matters

  • Representing PCM, Inc. before the Ohio Supreme Court in a dispute with the state, which claims PCM is responsible for paying $698,632 in use taxes, penalties and interest for supplies bought for its building in New Albany, Ohio.

Selected Publications

  • Co-author, "New York-New Jersey Remote-Work Tax Feud Needs US Intervention," Bloomberg Tax August 10, 2023 
  • Co-author, “Illinois Makes Significant Changes to Tax Code,” LawFlash, June 25, 2021 (Updated September 16, 2021)

  • Co-author, “Illinois Makes Significant Changes to Tax Code,” ISBA State and Local Taxation, August 6, 2021

  • Co-author, “State and Local Tax Responses to COVID- 19,” LawFlash, April 14, 2021

  • Co-author, “Beware States Offering Unilateral Advance Pricing Agreements for Transfer Pricing,” LawFlash, August 26, 2020

  • Co-author, “Taxpayer-friendly Cares Act Provisions Have State Income Tax Implications,” LawFlash, June 4, 2020

  • Author, “State Revenue Agencies Invest in Transfer Pricing Resources,” LawFlash, May 6, 2020

  • Co-author, “Pennsylvania Administratively Sets Bright-Line Economic Nexus Threshold for Corporate Net Income Tax,” LawFlash, October 3, 2019

  • Co-author, “Businesses Beware: California Extends Tax Reach to Out-of-State Sellers and Marketplace Facilitators,” LawFlash, April 30, 2019

  • Co-author, “Four States Sue Federal Government to Invalidate Cap on State and Local Tax Deduction,” LawFlash, July 18, 2018

  • Co-author, “Supreme Court Overturns Physical Presence Standard for Establishing Sales Tax Nexus,” LawFlash, June 21, 2018

  • Author, “Illinois Weighs In on Federal Tax Reform,” LawFlash, March 21, 2018

  • Co-author, “State Tax Implications of Federal Tax Changes to Section 162(m),” LawFlash, March 12, 2018

Media Hits

Selected Speaking Engagements

  • Co-presenter, "New York & New Jersey – Enhanced Unclaimed Property Audit Enforcement," BDO USA Webinar, August 24, 2022
  • Co-presenter, "You've Been Served: Ways to Defend Against Consumer Class Actions and False Actions Controversy," 2022 Annual Conference of the Institute of Professionals in Taxation, June 27, 2022
  • “Unique Ways to Challenge Local Taxes,” American Bar Association Tax Committee, January 2022

  • “State and Local Tax Trends Affecting Technology Companies,” Webinar, June 8, 2021

  • “State Transfer Pricing Enforcement: State Efforts and Taxpayer Best Practices,” Webinar, May 28, 2020

  • “The New Normal: Living in the Time After Wayfair (A Discussion of Economic Nexus),” May 21, 2020

  • Tax Controversy Seminar, The Tax Executives Institute (TEI) Los Angeles Chapter, Los Angeles, February 27, 2020

  • “Unclaimed Property: What You Need to Know & Best Practices,” Webinar, January 16, 2020

  • 2019 Annual Meeting of the California Tax Bar and California Tax Policy Conference, November 6, 2019

  • “Unclaimed Property Goes Tech,” Webinar, May 30, 2019

  • “A Closer Look: State Tax and Practical Implications of the US Supreme Court’s Decision in South Dakota v. Wayfair – Part II: Practical Implications for Retailers,” Webinar, June 28, 2018

  • “A Closer Look: State Tax and Practical Implications of the US Supreme Court’s Decision in South Dakota v. Wayfair – Part I: Overview of Decision and State Tax Implications,” Webinar, June 26, 2018

  • “State and Local Tax for Tech,” 2018 Technology May-rathon, May 31, 2018

  • 14th Annual Retail and Ecommerce Roundtables, March 20-21, 2018