Hi, I came to the states on June 1st, 2005 as an international student (F-1visa). I graduated on Dec 2010, and am still in the states with OPT.
I filed my tax return for 2010 by using turbotax, and I got Email approval notification. I've read that that kind of service is not for non resident alien, and I am curious that if I should have filed different form.

Since I am going to apply for green card soon, I do not want to have any problems...
So my question is, Will I need to amend my tax return as a non-
Resident?

Thank you,

You would have been a non-resident alien from 2005-2009. In 2010 you were a resident alien (assuming of course you were all those years in the US). So it was OK to file using Turbotax.