guys it is as simple as this...if you are in US for more than 5 years then you can file 1040...if not then as an international student you are suppose to file 1040NR-EZ. However I know some people file 1040 even though they have been in US for less than 5 yrs just to get more refund...well if u wanna take that risk it is your choice but if u get caught in Tax-audit then you will need to refile 1040NR-EZ and also pay some fine...

also if u wanna apply for greencard later then you should not take risk by filing 1040 if you don;t qualify for it.. ... instead you should file what you are suppose to file legally....my advice is to play it safe and not think about the money you will get now...but think about your future...prevention is better than cure..: -)