State tax filing

Take a look at your FL policy to see it covered full months, i.e. that it would have continued coverage until the end of Dec. (I assume you didn't become an MN resident until after Dec 1.)  Also, did you explicitly cancel the FL coverage in Dec?

 

The APTC tax form does ask for what states you resided in.   Your issue is whether you have to repay for the month you moved to MN.