Hi dirtyone,
The FAFSA can most definitely be filled out online, at <a href="http://www.fafsa.ed.gov." target="_blank">www.fafsa.ed.gov.</a> However, you DO need to make sure that you have the necessary documents on hand, i.e., 1040's, W2's, etc, both for yourself and for your parents.
The FAFSA can actually be filled out anytime between now and July. . . BUT, each individual school has its own deadline, which is usually sometime in March. I know that several schools, including Yale, had a March 1 deadline, even though decision letters will not be mailed out until the end of the month.
I hope that this helps! 🙂 (btw, what are you doing in South America? Anything exciting? 🙂 )