2025 Session Last amended: 2023 session

§ 289A.38 — Limitations on Time for Assessment of Tax

Plain-Language Summary

The state generally has 3.5 years from when a return is filed to assess additional taxes. If more than 25% of gross income was left off the return, the period extends to 6.5 years. There is no time limit if no return was filed or if the return was fraudulent. Special rules apply to withholding tax, sales tax, and estate tax.

Practical Notes
Filing an accurate return starts a clock that limits how long the state can audit you. The most important takeaway is that not filing a return or filing a fraudulent one means the state can come after you at any time. The 25% omission threshold that extends the period to 6.5 years applies to gross income, not net income.