I am currently Military with my permanent address being in CO. I am stationed in ME. I purchased/registered a vehicle in ME and paid Sales Tax. How do I file this return?

I have filed for CO and ME Non Residency. I see the vehicle section when it does a smart check of my ME NR return however it never brings me to that section. I have CO as my state of residency and I lived in a house in ME (Renting). I had to purchase and register the vehicle in ME.