IRS Tax Tips for New Businesses
Visit the IRS.gov website and click on the ‘Businesses’ tab for more information and resources, including a special section on starting a business. Publication 583, Starting a Business and Keeping Records, can also help new business owners understand their federal tax responsibilities. The publication is also available on IRS.gov or by calling 800-TAX-FORM (800-829-3676).
Publication 583, Starting a Business and Keeping Records (PDF)
Publication 538, Accounting Periods and Methods (PDF)