The main state income tax return individuals file each year — the closest state equivalent to the federal Form 1040.
How to complete California Form 540 for 2025 — filing status and exemptions, California adjustments on Schedule CA, the tax rate schedules, credits, use tax, deadlines, penalties, and where to file. Verified against the FTB’s 2025 form and booklet.
How to fill out Ohio Form SD 100 — traditional vs earned income tax base, the residency schedule, finding your district’s rate, credits, deadlines, and where to mail it.
How to fill out Ohio Form IT 1040 line by line — the 2025 nonbusiness income brackets, the flat 3% business income tax, exemptions by income, credits, deadlines, and where to mail it.
How to fill out Illinois Form IL-1040 line by line — who must file, the 4.95% flat rate, exemptions, subtractions for retirement income, credits, and the April 15 deadline.
How to fill out Pennsylvania Form PA-40 line by line — who must file, the 3.07% flat rate, income classes, Tax Forgiveness, deadlines, and where to mail it.