How to file a Tax Complaint
The presentation of a tax report through the Tax Agency website can be done using electronic identification (certificate or electronic DNI), system Cl@ve or without identification.
The complaint must contain the greatest number of known data that is necessary for the identification, by the Inspectorate, of the people reported, such as name and two surnames or company name in the case of legal entities, NIF , address, company name if applicable, etc.
The data and facts reported must be sufficiently specified and accompanied by the documentation available to prove such facts.
You have a downloadable tax report model to present in person at the Delegation or Administration of the Tax Agency closest to your home or send it by postal mail to any office of the Tax Agency.