Before you begin, gather your documents. Income documentation (those forms with names like "W2" or "1099") can come from a multitude of sources including your employer, financial institutions (if you hold interest bearing accounts), or even your school (if you have accepted some kinds of tuition assistance). You might also want to gather documents showing any spending on tax deductible things like childcare, education, or medical expenses.
If you are a student or employee at IU, we've gathered the likely places you can find your income documents.