Sorry - can't find a link to an English version of the Declaración Jurada, but below is what Aerolíneas Argentinas is telling its customers. I presume US and other carriers will provide appropriate links. Also embassy sites. Unfortunately the link provided by AerolÍneas is to a page that tells you a DDJJ (Declaración Jurado) is no longer needed. This is true for the DDJJ that was used in days of Covid, not true for present circumstances.
Affidavit for passengers travelling from or to Argentina
Due to national regulations (3025/2020), as of September 7th all passengers travelling from or to Argentina, must comply with the following requirements, within 48 hours prior to the trip.
Requirements
- Complete an electronic affidavit which can be found. at: http://ddjj.migraciones.gob.ar/app/
- At check-in, show the voucher they received in their email upon completion of the affidavit.
It is important for you to know that having the documentation required by both the country of origin and the country of destination is of the essence and necessary to board our flights. Due to the constant updating of the requirements and required documentation to travel imposed by each country, please always check them with the relevant Embassy or Consulate. Having said required documentation and complying with all migratory requirements of each country is the exclusive responsibility of each passenger. Otherwise, you won’t be able to board Aerolíneas Argentinas flights.
This seems to be Covid related from 2020 and not related to the new DNU