Pennsylvania business entities not required to report under Section 1641 of the Pennsylvania Tax Law include the following: 1. Sole proprietorship: A sole proprietorship is an unincorporated business owned and operated by one individual. As such, they are not required to file a report with the state under Section 1641. 2. Partnerships: Partnerships are unincorporated businesses that are owned by two or more individuals. Partnerships are not required to file a report with the state under Section 1641. 3. Limited Liability Companies (LCS): LCS are unincorporated businesses that offer their owners limited liability protection. LCS are not required to file a report with the state under Section 1641. 4. Non-Profit Organizations: Non-profit organizations are organizations that are exempt from taxation. Non-profit organizations are not required to file a report with the state under Section 1641. 5. Government Entities: Government entities, such as state and local governments, are not required to file a report with the state under Section 1641.