Yes, you can overturn a divorce agreement. However, there are only two instances where this would be allowed:
When there has been a change in your circumstances and the terms of the agreement no longer reflect your situation, you can request a post-judgment modification. For example, if you’ve suddenly lost your job and can’t keep up with child support payments. If the change is to do with property division, the court will usually not amend the agreement.
Alternatively, you can file an appeal if you think the judge has made a mistake, like overlooking evidence, or disagree with their findings. You can only file the appeal within 30 days of the judge signing the document, and you will be required to prove that the judge made a mistake.