I have filed a I-130 for my wife, that was in 1/2008 and it was approved in 10/2008 then they asked about the I864 I send it in 1/2009 I was a co sponser for my wife and in 03/28/2009 the said that they got all the doucuments, in april/09 she got the interview letter and in it they wrotr that they want the most recent tax return is it 2007 tax or 2008 the appointment in may/20, please if you know help me with it.