Available data: Open data catalog of the Tax Agency
The Tax Agency has a large volume of undeclared information reserved and that may be of high interest to any natural or legal person, due to its impact and value. This information, which is mainly statistical and concerns tax and customs affairs, is now being published on the Tax Agency portal on Internet.
You can access the information from this catalog directly, or through the Catalogue of public information New window of the Spanish Administration, included on the page "https://datos.gob.es."
The Tax Agency data catalog is shown below, which groups together sets of data generated by the Tax Agency and reusable according to the general terms and conditions of reuse: