OECD (2022), Towards Seamless Taxation: Supporting SMEs to Get Tax Right, OECD Forum on Tax Administration, OECD Publishing, Paris, https://doi.org/10.1787/656c89ab-en. Electronic invoicing is an important business application and part of a wider suite of electronic commerce functions such as e-procurement and e-payment. E-invoicing can be highly effective in lowering business transaction costs, enhancing security levels and in supporting and improving compliance. A growing number of tax administrations play an active role with respect to the exchange of e-invoices, including in some cases mandating requirements for the format and content of the invoice and for online reporting. The availability of digital invoice data gives tax administrations the opportunity to enhance audit capabilities and fraud detection and to innovate service delivery, for example pre-filling VAT returns. Depending on the context, e-invoicing can play a significant role in closing VAT and CIT tax gaps.