waiting4T

Well i was working in Vietnam April 2001 to April 2002, i have no W2, No paystubs, Nothing to do taxes. But on my I129-f i wrote that i worked in Vietnam. I can't claim it on my taxes for 2001 and i only had a job in the US for about 2 months before i went to vietnam. So i don't know what to do, if i don't claim it on my taxes they will see that, and then my taxes will only be for 2 months the whole year. I know the last year of taxes is what they mostly look at. Also i do have a Co-sponsor so will it not matter?? Or will i get into trouble for not paying taxes for when i worked in Vietnam???? Can anyone help??????