What is a sole proprietor? Upsolve Help August 19, 2018 19:05 A sole proprietor is someone who owns an unincorporated business by himself or herself. See definition here: https://www.irs.gov/businesses/small-businesses-self-employed/sole-proprietorships. Related articles Why you should not include credit card or personal loan debt payments in Schedule J (Expenses) Why it can make sense to wait to file bankruptcy if your tax refund was taken by a student loan lender What types of debts should be included in the contracts section (Schedule G) of the questionnaire/petition? I made a mistake on my questionnaire. What am I supposed to do? Comments 0 comments Please sign in to leave a comment.