[Fierce Allegiance]

If I buy a carton of smokes in New Hampshire, and smoke them in vermont while I am a CT resident, Am I liable for the Use tax in CT? How could it be proven that I am a tax cheat? Am I liable for Use tax if I purchase frireworks in NH that are not obtainable in CT?

I would be willing to bet something of significance that you yourself are a tax cheat by your own definition.

[Raycpa]

If I buy a carton of smokes in New Hampshire, and smoke them in vermont while I am a CT resident, Am I liable for the Use tax in CT?

Where did you use the cigarettes ? That is where the use tax applies. Also, most states have certain minimums.

How could it be proven that I am a tax cheat?

One can be a tax cheat and still get away with it.

Am I liable for Use tax if I purchase frireworks in NH that are not obtainable in CT?

Probably. The use tax applies to all things unless CT provides an exception.