- https://www.irs.gov/charities-non-profits/substantiating-charitable-contributions?_ga=2.265768079.1248843212.1635294626-1979687045.1634275619&_gac=1.21103177.1634846675.CjwKCAjwn8SLBhAyEiwAHNTJbSTGbSyE44JJDbKXORjqT3_RGuK9-aQuCrNFAih8RH-WkzAJkakL3BoC668QAvD_BwE
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