I came to US in 4/2010 as a Physician in Training on H1b (india). I filed 2010 Taxes as a Resident alien. I transferred from H1b to J1 in 7/2011 due to program requirement. Now Filing taxes for 2011, I was h1b for 6 months and J1 physician for 6 months. My country has tax treaty with US, So I am applicable to avail this treaty and file for tax refund based on J1 since it is valid for 2 years. I was wondering if any one can advice regarding tax filing for my case, I am confused if I have to file as Resident alien (H1b)for first 6 months and as non resident alien(J1) for last 6 months of 2011.
Thanks

You will have to file a dual-status return. Now time for my standard rant:

The dual-status return is NOT for amateurs! Get professional help from a competent atx professional who has experience filing these type of returns.

If you want my professional help, double-click on my title above and scroll down to my profile/signature. You will find my email address and websites there.