Wisconsin Schedule I: Your Income (individuals) is a form used by individuals who are filing Wisconsin income tax returns. It is used to report the individual’s gross income, adjusted gross income, taxable income, and income tax liability. The form has two types: Schedule I-A for residents and Schedule I-B for part-year and nonresidents. Both forms require the filer to provide information about their income sources, deductions, and credits. This form must be completed, signed, and attached to Form 1 or Form 1NPR for Wisconsin income tax returns.