Yes, you and your ex can amend the terms of your marital settlement agreement as you might amend any other contract. A marital settlement agreement can also be amended through a court order (and is required to be amended by the court if the terms are incorporated into the judgment of divorce) unless the agreement expressly states that the terms can’t be altered by a court order. However, the court will always retain the authority to change terms from a marital settlement agreement related to child custody or child support.