01 · Authority
There is no single national IIBB certificate
CABA uses AGIP, Buenos Aires Province uses ARBA, and Convenio Multilateral taxpayers use Padrón Web. Other provinces have their own authorities.
02 · Documents
Monotributo and IIBB are different records
The ARCA Monotributo certificate covers the national registration. An IIBB certificate covers the jurisdictional tax record.
03 · Security
Use credentials only on the official portal
This router does not request CUIT, CIT or Clave Fiscal. Follow the official service instructions after leaving this site.