@RegGuy @WhiteCatTamer @SpaceLifeForm @Tarah the part I couldn't find is if I mail on my ballot, how to cancel it. In the thread, it'd be in the case of a spouse voting by mail under duress, but also applicable if someone changed their mind.
I didn't see provisions to do that in UT, but found the process for Michigan (at least for primaries, but I'd assume it applies to general) fairly quickly. Their deadline should be tomorrow 2pm.