The use of digital technologies is transforming how tax administrations operate, helping to improve efficiency and service delivery. A striking example has been Peru's adoption of electronic invoicing, which allows the automatic transfer of billing information between firms and the tax authority. Drawn by its potential to strengthen tax compliance and reduce costs, Peru is among more than 50 countries around the world to have implemented e-invoicing and many others are preparing to follow suit. IMF economists Salma Khalid and Matthieu Bellon have been studying the impact of Peru's mandatory e-invoicing reform that started back in 2014. Their research paper will be published this fall. Salma Khalid is an economist in the Western Hemisphere Department and Matthieu Bellon is an economist in the Fiscal Affairs Department at the IMF.