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Business structures | Internal Revenue Service
Jul 14, 2025 The most common forms of business are the sole proprietorship, partnership, corporation, and S corporation.
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Firm vs. Company: Whats the Difference? - Difference Wiki
A firm is a business entity, often used to describe professional service providers, while a company is a broader term for any commercial business.
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Definition: business entity from 15 USC 6764(1)
The term business entity means a corporation, association, partnership, limited liability company, limited liability partnership, or other legal entity.
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