The Connecticut Instructions provide guidance to help you calculate your Use Tax due for Connecticut.
The General Use Tax Rate is 6.35%, however there are certain items that qualify for a 1% rate (computer and data processing services) and others that require a 7.75% rate (motor vehicles exceeding $50,000, jewelry exceeding $5,000 each, clothing or footwear exceeding $1,000 each and handbags, luggage, wallet, etc. exceeding $1,000 each). Vessels, motors for vessels, and trailers to transport vessels are subject to a 2.99% use tax rate
Use the tables on page 27 of the Connecticut Instructions to figure your Use Tax.