Sole Proprietorship:A sole proprietorship is an unincorporated business owned and operated by a single individual, where the owner is personally responsible for all business assets, liabilities, and income.
Self-Employment Tax: The self-employment tax is a tax consisting of Social Security and Medicare taxes for individuals who are self-employed, including sole proprietors.
Net Business Income: The net business income reported on Schedule C is the total revenue from the sole proprietorship minus the allowable business expenses, which is then included on the individual's personal tax return.