Certain elections treated as change in method of accounting— In the case of an election with respect to a specified taxable year for which the return of tax has already been filed before the date of the enactment of this Act, any election under paragraph (1) for such specified taxable year may be made on the return of tax for the first taxable year ending after the date of the enactment of this Act and shall be treated for purposes of
section 481 of the Internal Revenue Code of 1986 as a change in method of accounting initiated by the taxpayer and made with the consent of the Secretary.