I find it hard to believe that you have no recourse as to your husband's signing of your name to documents. Who provided that information to you? Your family law attorney? If you relied on what your husband's attorneys or advisors have stated in assessing the strength of your legal position, you are making a big mistake.
I suggest that you consult with an experienced civil fraud litigator to ascertain your rights. That litigator, in turn, may retain a fraud investigator to get to the bottom of this situation. Based upon what you have written, it certainly appears that your husband has improperly benefited from his forgery, especially his signing over of the Schwab accounts solely into his name.
The answer to this question does not establish an attorney-client relationship. Moreover, this attorney is licensed to practiced law ONLY in the State of California. Answers to questions from users in other jurisdictions or states are meant to provide only general information. Users should contact a local attorney in their jurisdiction or state to address their specific tax issue.