United States. Department of the Treasury. Treasury and IRS Delay Federal Tax Day from April 15 to July 15 Due to COVID-19 Outbreak : IRS Notice, March 21, 2020, Department of the Treasury : Documents Relating to the COVID-19 Pandemic. https://fraser.stlouisfed.org/archival/6321/item/606215/content/pdf/20200320_TR_TaxGuidance, accessed on March 15, 2026.