In general, you should describe your story and situation with full detail. Each case has its facts, but it should be a reasonable story. In addition, you should prepare for an interview if your facts are not very comprehensive. You better ask for help from an attorney, otherwise the chances of getting RFE is high.
You should talk to an attorney ... especially about why you filed your taxes the way you did.
PROFESSOR OF IMMIGRATION LAW for over 10 years -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.