John, my mistake on the terminology, should be using the VIN, not the registration number. Something is odd, when I keyed in the VIN for my Composite I get a test date for 2016. I expected no date since with the make of Composite, vehicle should be exempt.
At this stage, I am guessing. Might want to check using:
Emissions Division at (203) 805-6244, or email the DMV emissions division at
emissions@dmvct.org