(a) Every person, copartnership, company, joint stock company, trust, corporation, or association mining or receiving royalties from any quartz vein or lode, or placer or rock in place mining claim, containing gold, silver, copper, lead, zinc, coal, phosphate, limestone, or other precious or valuable minerals or metals, or mineral or metal deposits, must, on or before the fifteenth day of the fourth month following the close of the taxable year make a tax return to the state tax commission, stating specifically the items of income and the deductions allowed by this act. For the purpose of enforcing this act, the income tax returns filed in accordance with the provisions of the Idaho Income Tax Act shall be open to inspection by the officer designated to enforce this act.
(b)  In the event the taxpayer is entitled to an automatic extension of time to file the income tax return under section 63-3033, Idaho Code, an automatic six (6) month extension is granted to file the return required under this act. In all cases of an extension of time in which to file any return, interest shall be paid on any tax due from due date to date of payment at the rate provided in section 63-3045, Idaho Code.