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Expanded Instructions
  • Line: 35
  • Step: 8
  • Step Subject: Pay
  • Instruction Year: 2023

If you are required to make estimated tax payments but fail to make payments, you may be subject to a penalty in addition to any tax you may owe. The penalty is determined in the same way as for federal purposes. Consequently, you must include your Iowa income, and lump-sum taxes when calculating the penalty for underpayment of estimated tax.

If you are subject to this penalty, complete IA 2210 or IA 2210S and enter the penalty on this line. Include a copy of the IA 2210, or IA 2210S with your tax return. 

If you use the farmer/fisher or annualized method of computing the penalty, check the box on line 35 and, include a copy of your IA 2210F (for farmers and commercial fishers) or IA 2210 Schedule AI (Annualized Income Installment Method) with your tax return.

If you are due a refund, subtract the penalty amount from the overpayment you show on line 31 or line 32.

Individuals who expect to owe Iowa income tax of $200 or more for the tax year from income not subject to Iowa withholding tax must make quarterly estimated tax payments. These payments may be made online at after setting up an account or by mail with an Individual Income Voucher