Bibendum:
Look at previous postings for the three options (non-resident alien, resident alien, dual-status alien).
I recommend filing as a resident alien, because then you can for sure claim the standard deduction. I am not sure you can claim the standard deduction with the other two options. However, you must wait until after 2 April 2006 before you can file. Further, you must attach a statement to the return. Download IRS Pub 519 from
www.irs.gov and refer to "First Year Choice" to get the details.