Sources:
Reagan, HW Bush: https://efile.com/historic-1040-income-tax-returns-of-us-presidents-and-candidates/…
Clinton: https://apnews.com/article/6a04f87470804258301a2a45b603b677…
W Bush: https://georgewbush-whitehouse.archives.gov/news/releases/2002/04/20020412-6.html…
Trump: https://nytimes.com/interactive/2020/09/27/us/donald-trump-taxes.html?action=click