Hi I was a student and filed
1040 NR EZ for the first year 2005
Then some how I ended up filing 1040 2006, 2007
Now I am on H1B starting 2008
How Should I file my taxes this year.. can members advice

You probably converted to H-1B on 1 October 2008. If so, you need to file as a non-resident alien, filing Forms 1040NR-EZ and 8843 one last time.

You also need to amend your 2006 and 2007 returns, filing Form 1040X and attaching properly-prepared Forms 1040NR-EZ and 8843 to the Form 1040X for each respective year.