Rep. Tom Millett, R-Marion, right, speaks to a Montanan after a legislative hearing during the 2025 session. (Keila Szpaller/The Daily Montanan)

A Flathead Valley lawmaker is on the hook for more than $427,000 in unpaid federal taxes — an amount he has disputed — after the U.S. Ninth Circuit Appeals Court declined to take up his appeal from a federal district court.

Rep. Thomas Millett, R-Marion, did not file federal income taxes from 2004-2009, or 2011-2012, according to court documents, and he filed, but did not pay, federal taxes in 2010 and 2013-2017, except what was withheld by his employer.

In a ruling handed down by Montana Federal District Court Judge Donald Molloy in 2023, five years of tax liens were found to be legally attached to a property in Marion that Millett previously

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