I am filing an application to get a green card through my US citizen husband. I do not have an employment authorization, but I was working the entire time and filed income tax returns. My husband occasionally filed tax returns. However, this year he didn't show any income. Also,we have a cosponsor. How can I explain at the interview that I was working without authorization? Should I fill out any additional forms explaining it? Is there any penalty for this? What is the better way to solve this situation?