26 CFR § 1.1374-6 - Credits and credit carryforwards.
(a) In general. The credits and credit carryforwards allowed as credits against the section 1374 tax under section 1374(b)(3) are allowed only to the extent their use is allowed under the rules applying to C corporations. Any other credits or credit carryforwards, such as foreign tax credits under section 901, are not allowed as credits against the section 1374 tax.
(b) Limitations. The amount of business credit carryforwards and minimum tax credit allowed against the section 1374 tax are subject to the limitations described in section 38(c) and section 53(c), respectively, as modified by this paragraph. The tentative tax determined under paragraph (a)(3) of § 1.1374-1 is treated as the regular tax liability described in sections 38(c)(1) and 53(c)(1), and as the net income tax and net regular tax liability described in section 38(c)(1). The tentative minimum tax described in section 55(b) is determined using the rate of tax applicable to corporations and without regard to any alternative minimum tax foreign tax credit described in that section and by treating the net recognized built-in gain determined under § 1.1374-2, modified to take into account the adjustments of sections 56 and 58 applicable to corporations and the preferences of section 57, as the alternative minimum taxable income described in section 55(b)(2).