United States. Department of the Treasury. Mnuchin and Vought Release Joint Statement on Budget Results for Fiscal Year 2020 : Receipts by Source, October 16, 2020,
Department of the Treasury : Documents Relating to the COVID-19 Pandemic.
https://fraser.stlouisfed.org/archival/6321/item/605411/content/pdf/20201016_treasury_prSupplement_Receipts-by-Source, accessed on March 6, 2026.