September 19, 2020 17:28 Updated Follow Find forms online at our Indiana tax forms website, order by phone, at 317-615-2581 (leave your order on voice mail, available 24 hours a day). Find federal tax forms from the Internal Revenue Service online, or call 1-800-829-3676. Related articles How do I find the state form I need? Where can I locate a form? Can I pay the taxes I owe online? Can I file my Indiana individual income tax online? How do I obtain a state tax number to collect sales tax?