What are the following business entities?

• Sole Proprietorship
• Partnership
• S Corporation
• C Corporation

information for each business entity:

• Tax forms and schedules used to report income to the IRS
• The deadline the tax forms must be filed by for different entity
• The address the paper return must be mailed to for the State of Colorado
• The IRS publication for information on Federal income tax for that business entity

what is the importance of certification for the tax office's customers.