The National Tax Institute's (NTI) national headquarters are located in The Agora Building at 87 Terrace Hall Ave. in Burlington. NTI is a provider of continuing education for accountants, lawyers and other professionals. It develops programs that include resort conferences and self-study programs from literature and online as well. Previous conferences held by NTI have been in exotic locations like Aruba and Hawaii as well as in closer regions like Cape Cod and Pennsylvania.