There are no State Forms for most legal filings; those belong to the Judiciary branch of government, which creates and manages its own forms. The Indiana Courts have created the Indiana Legal Help website 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.