§ 212. Expenses for production of income

In the case of an individual, there shall be allowed as a deduction all the ordinary and necessary expenses paid or incurred during the taxable year—

(1) for the production or collection of income;

(2) for the management, conservation, or maintenance of property held for the production of income; or

(3) in connection with the determination, collection, or refund of any tax.

U.S. Code