Downloadable forms for eFiling, Divorces, and Suites Affecting the Parent-Child Relationship, Child Support, Hail Claims, Legal, LegalEase, and Passports. To modify a divorce decree in Texas, you must demonstrate a material and substantial change in circumstances.In general, Texas has very few official legal forms. This is why you will not always find a free fill-in-the-blank form for your situation. Civil Filing accepts all new suits and subsequent filings for civil and some family related matters filed in the Bexar County District Courts. If filing in Bexar County, you can purchase a DIY Divorce Packet from the clerk on the 5th floor of the Bexar County Courthouse. File an "amended petition" to add something to, or withdraw something from, the original petition. Have an attorney look over your amended petition. How do you change something in the original petition? What is the effect of amending a petition?