28. A tax system where income goes up and the tax rate goes down is known as: a. Regressive b. Progressive c. Proportional d. Excise 29. Which of these business organizations has a double tax? a. S-Corporation b. Limited Liability Company c. Sole Proprietorship d. C-Corporation 30. Which tax form is sent by an employer to the employee and IRS to let a client know how much they earned and how much taxes were withheld each year? a. W-4 form b. W-2 form c. Form 4868 d. Form 2848