1. An individual, estate, or trust that is subject to section 6654 of the Internal Revenue Code relating to a failure to pay federal estimated income tax shall, at the time prescribed in this chapter, pay estimated tax for the current taxable year. Notwithstanding any other provision of this section, an individual, estate, or trust whose net tax liability for the preceding taxable year was less than one thousand dollars is not required to pay estimated tax for the current taxable year. Married individuals who file a joint federal income tax return and are subject to section 6654 of the Internal Revenue Code must each be deemed to be subject to the federal provision. If payment of estimated tax is required, the individual, estate, or trust shall, at the time prescribed in this chapter, pay the lesser of the following:
a. An amount which, when added to the taxpayer's withholding, equals ninety percent of the taxpayer's current taxable year's net tax liability.b. An amount which, when added to the taxpayer's withholding, equals one hundred percent of the taxpayer's net tax liability for the immediately preceding taxable year.(1) This subdivision does not apply to any taxpayer who was not required by this chapter to file a return for the immediately preceding taxable year, to an individual who moved into this state during the immediately preceding taxable year, or to an estate or trust that was not in existence for the entire immediately preceding taxable year. The amount under this subdivision must be deemed to be equal to the amount in subdivision a if this part applies.(2) In order to satisfy the requirements of this subdivision, married individuals who are required to file separate state returns for the current taxable year but who were required to file a joint state return for the immediately preceding taxable year must each be required to pay estimated tax in an amount which, when added to the individual's withholding, equals the net tax liability which would have been computed for the immediately preceding taxable year if separate state returns had been required to be filed.(3) In order to satisfy the requirements of this subdivision, married individuals who are required to file a joint state return for the current taxable year but were required to file separate state returns for the immediately preceding taxable year must be required to pay estimated tax in an amount which, when added to their withholding, equals the sum of their separate net tax liabilities for the immediately preceding taxable year.