MINNEAPOLIS—A judge entered not guilty pleas on tax evasion charges Friday on behalf of Derek Chauvin, the former Minneapolis police officer convicted of murder in George Floyd’s death, and for the officer’s ex-wife. Washington County District Judge Sheridan Hawley also set the next court date in the case for Jan. 21. A trial date has not been set. Derek Chauvin appeared via Zoom for the brief hearing from the state’s maximum security prison at Oak Park Heights, where he’s serving a 22 1/2-year sentence for his conviction in April for second-degree murder in the May 2020 death of Floyd. Sitting in a prison conference room and wearing a white T-shirt, Chauvin said little except “yes, your honor,” to answer routine questions from the judge. Kellie Chauvin appeared from a different location. The nine felony tax evasion counts filed in July of 2020 allege that Derek and Kellie Chauvin underreported their …