Minn. Stat. § 297I.70
Except as provided in section 297I.75, a claim for refund of an overpayment must be filed within 3-1/2 years from the date prescribed for filing the return, or one year from the date of an order assessing tax or surcharge, or one year from the date of a return filed by the commissioner, upon payment in full of the tax, surcharge, penalties, and interest shown on the order or return made by the commissioner, whichever period expires later. Claims for refund filed after the 3-1/2-year period but within the one-year period are limited to the amount of tax, surcharge, penalties, and interest on the order or return made by the commissioner and to issues determined by the order or return made by the commissioner.
Minn. Stat. § 297I.70
2000 c 394 art 1 s 15