Section 45IAC3.1-1-12. Resident and nonresident trusts and estates

   Determination of Indiana Taxable Adjusted Gross Income for Fiduciaries. For purposes of the taxes imposed upon the income of estates or trusts and paid by the fiduciary thereof, estates and trusts are classified as either resident or nonresident. The residence of an estate or trust is the place where it is administered.

  Resident estates or trusts are taxable on all income regardless of where earned. Deductions are limited to those deductions taken and allowable on the Federal Fiduciary Return, Form 1041.

  Nonresident estates and trusts are taxable in Indiana on all income derived from Indiana sources. Income derived from sources within Indiana is divided into business and nonbusiness income.

  (A) Business income is income derived from transactions in the regular course of the taxpayer's trade or business, including income from intangibles where intangibles are an integral part of that business. Business income from a business located in Indiana would be included as income for a nonresident estate or trust. Such income would include rents or leases from property located in Indiana.

  (B) Nonbusiness income would include all other income other than business income. Such income shall be considered as derived from sources within Indiana if the property from which the income is derived has a situs in Indiana, and the property does not have a situs in any other state and the taxpayer has a commercial domicile in Indiana, or in the case of patent, or copyright royalties, the patent or trademark is either utilized in Indiana or utilized in a state in which the taxpayer is not taxable and the taxpayer's commercial domicile is in Indiana. (Department of State Revenue; Reg 6-3-1-3.5(c)(030); filed Oct 15, 1979, 11:15 am: 2 IR 1518; errata, 2 IR 1743)