Section 43-1301 - Definitions; estates and trustsIn this chapter, unless the context otherwise requires:
1. "Arizona gross income" means:(a) Of a nonresident estate or trust, the taxable income from sources within this state for the taxable year, computed according to the internal revenue code.(b) Of a resident estate or trust, the taxable income for the taxable year, computed according to the internal revenue code.2. "Arizona taxable income" of a resident or nonresident estate or trust means its Arizona gross income adjusted by the modifications specified in article 3 of this chapter.3. "Nonresident estate or trust" means an estate or trust that is not a resident estate or trust.4. "Resident estate" means the estate of a decedent who was a resident of this state at the time of death.5. "Resident trust" means a trust of which the fiduciary is a resident of this state. If a trust has more than one fiduciary, the trust is a resident trust if at least one of the fiduciaries is a resident of this state. If a corporate fiduciary engaged in interstate trust administration is the sole fiduciary of a trust, or is a cofiduciary with a nonresident, the trust is a resident trust only if the corporate fiduciary conducts the administration of the trust in this state.