Bilbao
Hacienda Foral de Bizkaia — SIAC Bilbao
Calle Capuchinos de Basurto 2–4, 48013 Bilbao
Apply online for a tax certificate, or book ahead and call if you need help in person.
Confirm certificate type, purpose, period and representation. Online identification: Bak, BakQ or an accepted electronic certificate.