When the level of taxation is a percentage of income, regardless of the size of the income, this is known as what kind of tax system? options:   Flat Taxation   Regressive Taxation   Normal Taxation   Progressive Taxation When a good or service is taxed at the same level, regardless of income, this is known as what kind of tax system? options:   Flat Taxation   Regressive Taxation   Normal Taxation   Progressive Taxation The level at which your personal income is taxed can be changed through: options:   Deductions   Credits   Exemptions   All of the above