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Welcome to the Boston Tax Institute​,​ Ltd. website. BTI was founded by Lucien P. Gauthier​,​ Esq.​,​ LL.M.​,​ CPA in 1982 in order to provide top-quality tax and accounting seminars throughout New England. These seminars are designed to keep CPAs and other tax practitioners up to date and informed on the latest tax developments and strategies while helping them meet their relicensing requirements.