We greatly appreciate our readers over the past year and are pleased to share that we were recently recognized by Law360 as the Tax Group of the Year.

In 2018, McDermott’s tax practice made headlines with its various high-profile state and local, US federal and international matters. Through our blogs, thought leadership pieces and

The National Taxpayer Advocate recently announced that the 4th International Conference on Taxpayer Rights will be held May 23 – 24, 2019, in Minneapolis, Minnesota. The purpose of conference is to connect government officials, scholars and practitioners from around the world to explore how taxpayer rights globally serve as the foundation for effective tax administration.

This post originally appeared on McDermott’s Inside SALT blog, which is dedicated to in-depth coverage of issues surrounding state and local tax.

In June 2018, just before the US Supreme Court ruling in Wayfair, Illinois enacted an economic nexus standard modeled after South Dakota’s law (see our prior coverage). The new Illinois standard takes effect on October 1, 2018. On September 11, the Illinois Department of Revenue (Department) issued an emergency rule (Regulation 150.803), together with other guidance found on its website, intended to assist remote retailers with compliance with the new law.
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On September 12, 2018, McDermott held the second Tax in the City® Seattle event this year and was pleased to welcome our partner Nina Siewert from our Frankfurt office to join US panelists Elizabeth Chao, Britt Haxton, Kristen Hazel, Sandra McGill and Diann Smith. The team’s key takeaways include:

  • Taxation of the Digital Economy – In March, the European Union proposed a 3 percent interim tax on digital services and a long-term expansion to the definition of a permanent establishment to include a “significant digital presence.” These proposals are unlikely to be passed during 2018. In the meantime, individual countries have passed or are considering unilateral measures to tax digital services.
  • Post-Wayfair – The Supreme Court’s Wayfair decision is good news for states, brick and mortar retailers and software compliance companies, and bad news for online retailers, start-ups and marketplace providers. Its impact on localities and foreign sellers remain to be seen.
  • Taxation of Multinationals: New Developments in US Tax Reform – Taxpayers should consider issues related to the new Base Erosion and Anti-Abuse Tax (BEAT), including whether royalties can be excluded from the BEAT, whether netting or a look-through concept should apply to BEAT; and how BEAT applies to cost-sharing agreements. The section 965 proposed regulations provide guidance about how basis adjustments apply to controlled foreign corporations (CFCs).
  • The Multilateral Instrument (MLI) – US taxpayers should be familiar with the MLI, which goes into effect in 2019. In order for the MLI to apply, both countries must sign the MLI and must opt into the same treaty provisions.


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McDermott Will & Emery recently published Issue 2, 2018 of International News, which covers a range of legal developments of interest to those operating internationally.

This issue focuses on the new rules for noncorporate US shareholders in relation to GILTI, the nuances of cryptocurrencies and the tax treatment of such, and highlights the most recent