Several EU Member States have been introducing continuous transaction controls (CTCs), aiming to close their VAT gaps, increase revenue and have more control over the data of their economy. However, the CTC regimes adopted by those countries are far from uniform. So far, Italy is the only country that obtained a derogation from the VAT Directive to introduce mandatory e-invoicing in domestic flows. Other countries, such as Hungary and Spain, instead adopted an e-reporting approach, which avoids the need for a derogation from the European Council as it does not mandate e-invoicing.
Source Sovos