As a bit of fun, today I provide an aged copy of the original Form 1040, Return of Annual Net Income of Individuals. While the United States had on other occassions imposed an income tax, the history of the modern income tax arises from the ratification of the 16th Amendment to the United States Constitution. The 16th Amendment was ratified on February 3, 1913. Shortly thereafter, we had the Form 1040 pictured below. This original 1040 was only 4 pages long...including instructions. My how far we have come.