Argentina announced last 31 October 2013 that effective January 1, 2014, it would no longer support the “factura local” web service and would require companies to instead use the more detailed “factura MTX” web service instead. The local web service (also known as “sin details” or without line item level details) is a very high level summary of the invoice data containing “header” info only. The MTX web service contains this header level info as well as additional details at the line item level, including quantity, price and total amount for each item.

Are you part of the tax regimes that the mandate effects? For more information on the resolution: http://biblioteca.afip.gob.ar/gateway.dll/Normas/ResolucionesGenerales/reag01003536_2013_10_30.xml

Source: http://biblioteca.afip.gob.ar/gateway.dll/Normas/ResolucionesGenerales/reag01003536_2013_10_30.xml