Among the innovations introduced into the Internal Revenue Code by the Revenue Act of 1942 was the provision allowing deduction from gross income, in the computation of net income, of nontrade and non-business expenses. Every revenue act including the Act of 1894, has provided in one form or another for the deduction of trade and business expenses.
R. W. Nahstoll,
NON-TRADE AND NON-BUSINESS EXPENSE DEDUCTIONS: SECTION 23(A)(2) OF THE INTERNAL REVENUE CODE,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol46/iss8/2