7. The Internal Revenue Service has influenced tax law in many ways. Which of the following is an example of how the IRS has influenced tax law. a. IRS helps to protect the revenue of the tax system b. IRS determines the tax liability of each taxpayers c. IRS allows for a clean administration of revenue collecting d. The IRS makes all final decisions in tax disputes 8. Social Security Benefits can be taxable - which of the following are true regarding the taxability of the benefits. a. Age of Taxpayer determines taxability b. Social Security is not Taxable c. Filing Status does not affect calculation of taxability of benefits d. Modified Adjusted Gross Income is used to determine taxability