There are no State Forms for most legal filings; the Judiciary branch of government creates and manages its own forms. The Indiana Courts have created the Indiana Legal Help website (https://indianalegalhelp.org/) to assist citizens who are representing themselves in court; any court forms that they have made publicly available are posted there.
Be aware, however, that many legal filings don't have a prescribed form to fill out. You may need to seek legal representation or advice to determine what must be submitted for your specific case, and how to submit it.