Active Duty Military - NYS State Tax Exemption Help

Good Afternoon/Morning!

 

I have been Active Duty in the US Military for nearly 6 years now and I am just now learning that I can file for tax-exempt status with New York State as I am a New York Resident but have never permanently lived in NYS while I have been in Active Duty Status (the past six years).  

 

So... I have no idea where to start.  1) How for back can I file this tax exempt status?... 2) How do I go about filing for previous years to get refunds?... 3) What documents do I need in order to get this done properly?

 

Any help with this would be greatly appreciated!  Thank you!