TITLE 26. INTERNAL REVENUE CODE § 170. Charitable, etc., contributions and gifts., 26 USCS § 170
Summary
(a) Allowance of deduction.
(1) General rule. There shall be allowed as a deduction any charitable contribution (as defined in subsection (c)) payment of which is made within the taxable year. A charitable contribution shall be allowable as a deduction only if verified under regulations prescribed by the Secretary.
(2) Corporations on accrual basis. In the case of a corporation reporting its taxable income on the accrual basis, if—
then the taxpayer may elect to treat such contribution as paid during such taxable year. The election may be made only at the time of the filing of the return for such taxable year, and shall be signified in such manner as the Secretary shall by regulations prescribe.