Learn about forming and registering your business online, and how to complete other types of business filings. Register your business (opens in a new tab).To form an LLC, a Certificate of Organization is required to be filed with the Corporation Bureau of the. The Payroll Expense of a Partner or Self-employed person is the cumulative annual Taxable. Please identify the address and Block and. Lot number of all property that you own in Allegheny County. "Closely held corporation. " A business corporation that: (1) has not more than 30 shareholders; or. (d) Status and rights. Business within their jurisdiction.