Spanish gestor needed — file a nil Modelo 303 (2T 2026) for a dormant SL via colaboración social

Hi, My digital certificate for connecting to Spanish government agencies has expired, and I'm having technical issues renewing it. So I need a trusted accountant to file a Modelo 303 (2T 2026) on my behalf. You'll need to be registered with the AEAT for colaboración social, so you can file for me using your own certificate — I believe most Spanish accountants have this. The Modelo 303 itself is straightforward: my company is a dormant SL with no activity, so it's a nil return ("sin actividad, resultado cero"). I can provide all the data plus previous quarters' filings for reference. What I need: * Confirmation you're registered for colaboración social (able to file for third parties with your own certificate). * You provide the authorisation document for me to sign. * You file the return and send me the official justificante (PDF with CSV code). This is a relatively small piece of work — but hopefully there'll be more coming up. Look forward to speaking with you, Fred