(1)    In this section:

      (a)    “Department” means the department of revenue.

      (b)    “Tax” means an amount that is owed to this state under s. 66.0615 (1m) (f) 3. or ch. 71, 72, 76, 77, 78, or 139, and that is not delinquent.

   (2)   

      (a)    A taxpayer may petition the department to reduce the taxpayer’s taxes, including the costs, penalties, and interest related to the taxpayer’s taxes. The petition shall set forth a sworn statement of the taxpayer and shall be in a form that the department prescribes. The department may examine the taxpayer under oath about the petition and may require the taxpayer to provide the department with financial statements and any other information requested by the department that is related to the petition.

      (b)    If the department determines that the taxpayer is unable to pay the taxes, costs, penalties, and interest in full, the department shall determine the amount that the taxpayer is able to pay and shall enter an order reducing the taxes in accordance with the department’s determination. The order shall provide either that the order is effective only if the reduced taxes are paid in full within 10 days from the date on which the order is issued or that the order is effective only if the reduced taxes are paid according to a payment schedule that the department determines. The department or its collection agents, upon receipt of the order, shall accept payment in accordance with the order. Upon payment of the reduced taxes, the department shall credit the unpaid portion of the principal amount of the taxes and record the unpaid amount of costs, penalties, and interest accrued to the date of the order.

      (c)    If within 3 years from either the date of the order under par. (b) or the date of the final payment according to a payment schedule as determined under par. (b), whichever is later, the department of revenue ascertains that the taxpayer has an income or owns property sufficient to enable the taxpayer to pay the unpaid portion of the principal amount of the taxes due, including the costs, penalties, and interest recorded under par. (b), the department shall reopen the order under par. (b) and order the taxpayer to pay in full the unpaid portion of the principal amount of the taxes due, including the costs, penalties, and interest recorded under par. (b). Before the entry of the order for payment, the department of revenue shall send a written notice to the taxpayer advising the taxpayer of the department’s intention to reopen the order under par. (b) and fixing a time and place for the appearance of the taxpayer, if the taxpayer desires a hearing. If the department of revenue determines that the taxpayer is able to pay the unpaid portion of the principal amount of the taxes due, including the costs, penalties, and interest recorded under par. (b), the department shall enter the order for payment in full. The unpaid portion of the principal amount of the taxes due, including the costs, penalties, and interest recorded under par. (b), are due and payable immediately upon entry of the order for payment in full and thereafter are subject to the interest under s. 71.82 (2), as that subsection applies to delinquent income and franchise taxes under s. 71.82, and to the delinquent account fee under s. 73.03 (33m).