Hello,
I an international student with F1 visa. I started in Fall 2013 so I had no idea about tax return. One of my friends did it for me and I am sure he has made a big mistake by using turbotax for my tax return. The amount of my money that I received was much regarding my earnings in only 4 months in 2013. That is why I started searching and now I know that it was a mistake.
I read previous post and saw you are are talking about educational credit and deduction, what are those thing?

And What should I do now? (by the way I am from Iran)
Regards,
Sia

There is NO treaty exemption for Iranians, so you CANNOT claim the standard deduction, nor are you eligible for education credits.

You need to amend the return, submitting Form 1040X and properly-prepared Forms 1040NR-EZ and 8843, and pay back the education credits you probably got.