is due to negligence, to intentional disregard of rules and regulations, or to fraud with intent to evade tax. (5) Election Any election under paragraph (1) shall be made not later than the due date for the return of tax for the taxable year described in subsection (a) and shall be made in such manner as the Secretary shall provide. (6) Net tax liability under this section For purposes of this subsection— (A) In general The net tax liability under this section with respect to any United States shareholder is the excess (if any) of— (i) such taxpayer’s net income tax for the taxable year in which an amount is included in the gross income of such United States shareholder under section 951(a)(1) by reason of this section, over (ii) such taxpayer’s net income tax for such taxable year determined— (I) without regard to this section, and (II) without regard to any income or deduction properly attributable to a dividend received by such United States shareholder from any deferred foreign income corporation. (B) Net income tax The term net income tax means the regular tax liability reduced by the credits allowed under subparts A, B, and D of part IV of subchapter A. (i) Special rules for S corporation shareholders (1) In general In the case of any S corporation which is a United States shareholder of a deferred foreign income corporation, each shareholder of such S corporation may elect to defer payment of such shareholder’s net tax liability under this section with respect to such S corporation until the shareholder’s taxable year which includes the triggering event with respect to such liability. Any net tax liability payment of which is deferred under the preceding sentence shall be assessed on the return of tax as an addition to tax in the shareholder’s taxable year which includes such triggering event. (2) Triggering event (A) In general In the case of any shareholder’s net tax liability under this section with respect to any S corporation, the triggering event with respect to such liability is whichever of the