If you are stationed in Connecticut on active duty but are not a Connecticut resident, you pay a reduced 4.5 percent sales tax rate when you buy or lease a motor vehicle. You can buy on your own or jointly with your spouse.
Complete Connecticut Department of Revenue Services Form CERT-135 and give it to the Connecticut licensed dealer with any other paperwork they ask for, at the time of purchase.
A completed Form CERT-135, your military ID, and orders showing you are stationed in Connecticut and are not a Connecticut resident.