Cl@ve (digital ID system)

Cl@ve is the electronic identification system used by Spanish public administrations, allowing access to online procedures without needing a digital certificate. It includes Cl@ve PIN, based on a one time code, and Cl@ve Permanente, based on your own password, and is used to check and file procedures with the tax agency, Social Security and other bodies.

To start using it, you first need to register in person or with a digital certificate before you can use it fully online.

An autónomo uses it to check their tax data, download the draft income tax return, see their Social Security situation or file some returns. Cl@ve PIN is for one-off access: you request a code and it expires shortly. Cl@ve Permanente is more convenient for frequent use and adds an extra code for sensitive operations.

The typical mistake is relying on Cl@ve for everything. Some procedures require a signature with a digital certificate, and an SL usually needs the representative certificate rather than the director's personal Cl@ve. Another slip is leaving it to the last day: if you have to recover access or change the linked phone, the deadline can catch up with you.

It is linked to the certificado digital and to representation before the tax agency. Cl@ve identifies you as a person; if an advisor files for you, they use their own access and your authorisation. The returns you prepare box by box in kontora you file from the app itself with your digital certificate (303, 130, 111, 115 and 123 by direct filing; 349, 347, 190, 180 and 193 through TGVI); with Cl@ve, you file them on the tax agency's website.

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Declaración responsable (self-certification)

Certificado digital (digital certificate)

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