Supplier Document Type and Number
Set up AFIP document types in the ARG-A/B Legal Document Type (76A/A0) UDC table; and then you must specify both the AFIP document type and the document number on the A/B Additional Information - Revision form when you set up address book records for suppliers.
For foreign suppliers, specify the foreign document number that is defined by AFIP for each country. Do not enter the CUIT from the country to which the supplier belongs.