I am an international student currently on OPT with a f-1 visa. I started coming to the US in sep 2007 with J-1 status for one year, then subsequently completed a 4-year undergrad degree with F-1 status.

I know that F-1 holder will be considered as non-resident for tax purposes for 5 years. I am in my 5th year of my f-1 visa now. Given that I previously was on J-1 for one year, will this year considered as a NR?

The one year under the J-1 DOES count against the 5-year F-1 period, so your last year as a non-resident alien wasx 2011.

For 2012, you will file as a resident alien, filing Form 1040/1040A/1040EZ AND you can qualify to claim the education credits such as Lifetime Learning and American Opportunity Credits.

If you need professional help filing, email me at the email address in my profile (if you cannot see it below).