How to access Pre303?
We inform you of everything you need to know about How to access Pre303?
The Pre303 service is a help service that is offered when the model is to be submitted through the AEAT electronic headquarters (via form).
You can access in your own name (with Cl@ve PIN, DNI and electronic certificate) or empower a third party to access on your behalf.
Additionally, some of these services will also be available to all taxpayers as specific and independent services. They can be found in the Pre303 section.