Anti-hybrid legislation consistent with A.T.A.D. 2 has been in effect in Italy for fiscal years beginning on or after January 1, 2020. But towards the close of last year, legislation was enacted under which penalty relief is available as of the 2023. The key to obtaining relief is the “hybrid dossier,” which is submitted to the tax authorities and provides full disclosure of the hybrid transactions, the relevant laws in Italy and the other country, and the reasoning why the anti-hybrid penalties are inapplicable. While the new rules clearly apply beginning with the 2023 fiscal year, retroactive relief back to the 2020 fiscal year is allowed, provided one hurdle is overcome. Retroactive relief is available if, and only if, Italian tax authorities “have not started a tax audit, investigation activities, or other similar actions for those fiscal years.” It is understood that Italian tax authorities have already begun to notify targeted taxpayers with questionnaires. In their article, Federico Di Cesare, a Partner of Macchi di Cellere Gangemi in Rome and Milan, and Dimitra Michalopoulos, an Associate in the tax practice of Macchi di Cellere Gangemi in Rome, explain the legislation, address the content of the hybrid dossier, and address the most important issue for many taxpayers: have Italian tax authorities taken action similar to a tax audit by the circulation of the questionnaire?