The Revenue Commissioners (Revenue), is the Irish Government agency responsible for customs, excise, taxation and related matters. Its core activity is the assessment and collection of taxes and duties. Since 2013, Revenue has implemented a phased introduction of the requirement to file electronic Financial Statements as part of the Form CT1. All companies that are required to prepare accounts under the Companies Act 2014 must submit their Financial Statements in iXBRL format to Revenue. However, Revenue has progressively mandated the submission of Financial Statements in iXBRL format on a phased basis for Corporation Tax filers. There will be a gradual transition until eventually all Corporation Tax payers will submit their Financial Statements in iXBRL format.