I stay in the USA from 2000. Me and my wife were F1 students till 2007. We submitted 1040NR for the years 2000 thro' 2003. From 2004 we started submitting 1040 jointly as allowed per the substantial presence test then. In 2008 my wife became F2. And in 2009 she changed to J1. We submitted 1040 for the years 2004-2008. Can we sumit 1040 for 2009 too or we have to go back to 1040NR again?