You may also need to file your amendment form with your local court or county office, depending on the rules of your state. To be eligible to make a trust amendment, the grantor must have legal capacity, and the original trust document must permit amendments.Are you looking to amend, update, or restate your trust? Use this guide to help navigate you through all parts of the trust amendment process. The settlor may revoke or amend a revocable trust in any of the following ways: (a) By substantially complying with a method provided in the terms of the trust. The simplest way to make a change to a living trust is with a trust amendment form. A living trust amendment allows you to make changes to an existing trust. SCAO-Approved Forms for Use in Estates, Trusts, and Miscellaneous Probate. This set of forms is for use in probate proceedings. The certificate must be in the form of an affidavit.