Italy published the Decree of 31 March 2026 from the Ministry of Economy and Finance in the Official Gazette on 16 April 2026. The decree approves synthetic indexes of taxpayer reliability (Indici Sintetici di Affidabilità fiscale, ISA) for 85 economic (business) activity categories for the 2025 tax period, with certain categories broken down into further sub-categories. ISA is a system for assessing the level of compliance (reliability) of a taxpayer. A higher rating results in additional b…