§ 1.245A-11(a) In general. Sections 1.245A-6 through 1.245A-11 apply to taxable years of a foreign corporation beginning on or after December 1, 2020 and to taxable years of section 245A shareholders in which or with which such taxable years end.
§ 1.245A-11(b) Exception. Notwithstanding paragraph (a) of this section, a taxpayer may choose to apply §§ 1.245A-6 through 1.245A-11 for a taxable year of a foreign corporation beginning before December 1, 2020 and to a taxable year of a section 245A shareholder in which or with which such taxable year ends, provided that the taxpayer and all persons bearing a relationship to the taxpayer described in section 267(b) or 707(b) apply §§ 1.245A-6 through 1.245A-11, in their entirety, and § 1.6038-2(f)(18) for all such taxable years and any subsequent taxable years beginning before December 1, 2020.