Filing your Wisconsin state income tax return applies if the taxpayer was a full-year resident of Wisconsin they must file Form 1 for that particular tax year and the taxpayer is required to file a federal individual income tax return for that tax year. The filer has maintained their place of permanent abode in Wisconsin state for 30 days immediately preceding their application for approval. The due date falls on April 15 of the tax year. If the due date falls on a Saturday, Sunday, or legal holiday, the due date is moved to the next business day.
If the taxpayer was a part-year resident of Wisconsin they must file a tax return for that particular tax year. If the resident has resided for only part of the year, they must file Form 1NPR. The taxpayer will be taxed on all income they earned while they were a resident.
If the taxpayer was a full-year non-resident of Wisconsin for that particular tax year. All income received during the period of residency is taxable in Wisconsin, regardless of where that income is earned, unless specifically exempted.