Information from official Argentinean sources
REQUIREMENTS ON ENTRY TO THE ARGENTINE REPUBLIC
COUNTRIES THAT DO NOT REQUIRE A VISA TO ENTER ARGENTINA:
Date of update: April 7th, 2022
a) Fill out the form "Declaración Jurada electrónica (DDJJ)":
The DDJJ must be filled within 48 hours prior to the start of your trip. Once you complete the form, you will get an e-mail confirmation which will be requested by the airline at the time of check in. Find the form in the following link: https://ddjj.migraciones.gob.ar/app/home.php
Those who enter the country for a period of less than 24 hours and do it through land ports will be exempt.
b) Present proof of health insurance with international coverage that covers COVID-19 care in case you contract COVID-19 while you are in Argentina. No specific amount required, just a letter from the provider stating you are covered for emergencies while you are in Argentina.