So I realized that my last trip back to the US was in December and I returned to Argentina in January.. Since then the 20% charge was added to international flights. Now that I am moving back permanently to the US I purchased my ticket on a US credit card. I was not charged the 20% and I just want to make sure I wont get any surprises in November. Has anyone recently traveled in or out of Argentina on a flight paid with a US or intenational CC? Were you asked about the 20% at the airport? Im not a resident of Argentina, so I would assume that they would just treat me like a tourist and not charge me. However, I wanted to check with you all first. Thanks!