Multistate Tax alert archive

State tax legislative, judicial, and administrative developments

​The Multistate Tax alert archive includes external tax alerts issued by Deloitte Tax LLP's Multistate Tax practice during the last five years. These external alerts highlight selected developments involving state tax legislative, judicial, and administrative matters. The alerts provide a brief summary of specific multistate developments relevant to taxpayers, tax professionals, and other interested persons.

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COVID-19: Updated state and local tax due date relief developments

In response to the Novel Coronavirus (COVID-19) pandemic, state and local governments are employing various strategies to propose due date relief to businesses and individuals through tax guidance and legislation. This alert discusses due date relief provisions of:

  • Internal Revenue Service (IRS) Notice 2020-181; and
  • Various State and Local Responses.


1 Notice 2020-18 is available here. This supersedes IRS Notice 2020-17, issued on March 18, 2020, available here. Notice 2020-18 restates and expands upon the relief provided in Notice 2020-17.

2019 Multistate Tax alerts


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2018 Multistate Tax alerts


2017 Multistate Tax alerts