You can request that she produce the tax returns as part of the CS adjustment proceedings. However, this is not typically do-it-yourself stuff. You should seriously consider retaining counsel for the proceedings.
Evan A. Nielsen is licensed to practice law in California and handles federal tax matters throughout the U.S. The information provided here is for educational purposes only and is not intended as legal advice for a particular matter. This response does not create any attorney-client relationship with the author. For specific advice about your particular situation, please consult an attorney.