26 CFR § 301.6362-1 - Types of qualified tax.
(a) In general. A qualified tax may be either a “qualified resident tax” within the meaning of paragraph (b) of this section, or a “qualified nonresident tax” within the meaning of paragraph (c) of this section.
(b) Qualified resident tax. A tax imposed by a State on the income of individuals, estates, and trusts which are residents of such State within the meaning of section 6362(e) and § 301.6362–6 shall be a “qualified resident tax” if it is either:
(1) A tax based on Federal taxable income which meets the requirements of section 6362 (b), (e), and (f), and of §§ 301.6362–2, 301.6362–6, and 301.6362–7; or
(2) A tax which is a percentage of the Federal tax and which meets the requirements of section 6362 (c), (e), and (f), and of §§ 301.6362–3, 301.6362–6, and 301.6362–7.
(c) Qualified nonresident tax. A tax imposed by a State on the wage and other business income of individuals who are not residents of such State within the meaning of section 6362(e)(1) and paragraph (b) of § 301.6362–6 shall be a “qualified nonresident tax” if it meets the requirements of section 6362 (d), (e), and (f), and of §§ 301.6362–5, 301.6362–6, and 301.6362–7.