710:50-5-10 Assessment procedure; assessment based upon information derived from Internal Revenue Service

(a) Assessments shall be made in accordance with the Uniform Tax Procedure Code. The income information furnished by the I.R.S. shall be that upon which any tax liability is computed. Unless otherwise indicated in the Revenue Agent's Report (R.A.R.), all income is considered to be from Oklahoma sources, as are all deductions and credit, to the extent that they are allowed by Oklahoma Statute. The taxpayer is considered to be, or to have been an Oklahoma resident during the year or years examined by the I.R.S. by virtue of the fact that the results of the examination are disclosed to the Commission by the I.R.S. The assessment shall be mailed to the address shown on the R.A.R. or the last known address of the taxpayer. (b) In cases where returns have not been previously filed by the taxpayer, the Tax Commission may, in its discretion and in the alternative to assessing taxes, demand that the taxpayer file a return as required. For the purpose of this Section, the determination that the taxpayer was, in fact, required to file an Oklahoma Tax Return shall be based on the information furnished by the I.R.S.