Note: The DearEsq free 'ask a lawyer' site is offered as a free informational service to the public and is not intended as legal advice. Laws vary from state-to-state, and in addition every situation is unique, and relevant facts may not be known. The answer to the question posed below may not apply to in your state or to your situation. For legal advice in your state and your situation you should consult with an attorney in your state who is familiar with the rules and laws in your state.
What obligation do I have to send my ex our joint tax returns filed during our marriage?
If there is a discovery request, or pending court order demanding you to send the returns, then you should comply. Otherwise, the decision is up to you. As always, consult with a local attorney for legal advice and guidance on how to best proceed.