Plain-English, line-by-line guides to U.S. state tax forms — every line, who files, the deadline, and where it goes.
3 guides across 3 states, and counting · each checked against that state’s current official form · every guide dated · free, no sign-up.
Browse by state
Illinois
1 guide — Illinois has a flat 4.95% individual income tax that starts from your federal adjusted gross income, with subtractions for Social Security and most re
Ohio
1 guide — Ohio taxes nonbusiness income at graduated rates and business income at a flat rate after the business income deduction, all starting from federal adj
Pennsylvania
1 guide — Pennsylvania has a flat personal income tax that taxes eight specific classes of income, a separate local earned income tax collected by municipalitie
Popular forms
- Illinois IL-1040 — Individual Income Tax Return
- Pennsylvania PA-40 — Pennsylvania Income Tax Return
- Ohio IT 1040 — Individual Income Tax Return
Latest guides
- Ohio Form IT 1040 — Individual Income Tax Return
- Illinois Form IL-1040 — Individual Income Tax Return
- Pennsylvania Form PA-40 — Pennsylvania Income Tax Return
New guides are added regularly. How we verify every figure.