Spouse Amended A Return Without My Knowledge & Claimed Non Existent Income

Going through divorce, in binding arbitration, spouse dragging feet on disclosure and spending $$$ on various things and now I've discovered they have amended past tax returns and claimed foreign income without supporting documentation and paid nearly $200k in back taxes using marital funds. I suspect they were planning on divorce and did this at the very least to make funds disappear. My attorney thinks spouse might've applied for a business loan using these false tax documents.

This return is from the time before separation. I have proof that he was the one who tampered with the return.

What are the consequences? For me and for the spouse. What kind of compensation should I ask other than indemnification.