The Catalan Tax Agency (ATC) has published the final list for the 2024 fiscal year of all vehicles subject to the CO₂ emissions tax. Starting September 1, owners of one or more vehicles can check their details and the tax they must pay on the Agency's website, via My ATC space, with digital identification (IdCAT Mobile or other digital certificate). To check a single vehicle, basic access is available with a tax identification number and registration number, without the need for digital identification.