Business Tax Guide Hub

US small businesses file federal taxes on different forms depending on their structure - Schedule C for sole proprietors, Form 1065 for partnerships, and Form 1120 or 1120-S for corporations. This hub links every LegalGlass business-tax guide, from choosing the right form to meeting quarterly deadlines.

Business tax turns on your entity type and your elections, and small mistakes on forms or dates can be costly. The guides below explain each topic in plain language, sourced from IRS forms, instructions, and publications. If you are a sole proprietor, start with Schedule C; if you are weighing an S-corporation election, start with LLC vs S-corp tax and Form 2553 explained.

Guides in This Hub

• Schedule C
  How sole proprietors and single-member LLCs report business income.
• Form 1120 vs 1120S vs 1065
  Which entity return your business files and why.
• Form 2553 Explained
  Electing S-corporation status, deadlines, and eligibility.
• Self-Employment Tax
  The Social Security and Medicare tax on self-employment income.
• LLC vs S-Corp Tax
  How default LLC taxation compares to an S-corp election.
• Quarterly Estimated Taxes
  Who must pay, how much, and the four annual due dates.
• When Are Business Taxes Due?
  Filing deadlines by entity type and tax year.
• How to File Business Taxes
  A step-by-step overview of filing your federal return.

Related Hubs

Filing taxes comes after setup. See the EIN hub for the tax ID you file under, the trademark hub to protect your brand, and the glossary for terms such as S-corp, C-corp, and franchise tax. For structure decisions, see S-corp vs LLC and how to form an LLC.

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws and fees change; verify current requirements with the IRS before acting.