Pennsylvania REV-1504 -- Schedule C — Closely-Held Corporation, Partnership or Sole-Proprietorship is a form used by the Pennsylvania Department of Revenue to report the income, gains, losses, deductions, and credits of a closely-held business. It is used by corporations, partnerships, and sole proprietorship to report their income on the state level. It is also used to calculate the amount of tax due to the state. The form has three different versions depending on the type of business entity filing: 1. Schedule C-Closely-Held Corporation: Used by corporations that are owned and managed by fewer than 5 shareholders. 2. Schedule C-Partnership: Used by partnerships to report the income, gains, losses, deductions, and credits of the business. 3. Schedule C-Sole-Proprietorship: Used by businesses that are owned and managed by a single individual. The form requires businesses to provide information on their income, expenses, and other financial information. It also requires businesses to calculate their net income or loss, which is then used to determine the amount of tax due.