Hi ther, I have some questions about obtaining a Firma Electronica. I've done the first step and have a code which I understand I need to take to an office so they can check my ID documents. There are lots of offices I can go to - does it matter which I attend? At the ayuntamiento they only do firmas for personas fisicas but at the AEAT they also do firmas for personas juridicas. Can anyone explain the difference to me? If I need the firma to do the Declaracion de Impuestos online do I need a particular one?