Hi everyone!
I could extend my 3 months visa today and I would like to share my experience.
I was there (Av. Antártida Argentina 1355, Buenos Aires) at 11 am this morning. I had the keyword "prórroga" and asked the first officer with a badge I saw there. He redirected me to a line. There are two lines, when you get in the line in front of the building, you should ask the other officer with a badge you see there for "prórroga" again. Do not waste your time waiting in the wrong line! He/She may redirect you to the other line and when it's time, they check your passport and let you in the building. After you pass the security line with Covid precautions, another person redirects you to another line if you say "prórroga", but first he/she checks your passport (it must be a maximum of 10 days prior to your visa expiration date). I did not have the stamp on my passport so I showed him the email from Migraciones on my phone.
There was only one person in the next line and after some waiting -like 5 minutes-, I could talk to the officer I needed to talk to. He redirected me to another line after he checked my passport.
And this is the last line. You need to wait and wait and wait. After like 40 minutes of waiting, I could talk to the officer. She requested me to go and pay 4000 Pesos. "Cajas" is in the next building, they are easy to find. I waited like 2 minutes in the line for that "Caja" and I could pay.
After paying that, I returned back to the officer and she was waiting for me. I spent some more time filling in some personal information like passport number, address, and email. After that, she gave me a paper that describes how I can check my new visa status via
www.migraciones.gov.ar.
It was very smooth and I also asked her about "Digital Nomad Visa". She helped me a lot and I am going to share my experience if I apply for that visa.