Using the single individual tax brackets, Moana's taxable income ($250,000) falls in the fifth bracket where taxable income is over $186,350 but not over $405,100. This means that she needs to pay $45,353.75 plus 10% of the amount in over $186,350. Computing the tax of Moana, you can get $51,718.75 (($45,353.75 x 10%($250,000 - $183,650)). If she uses the corporate tax brackets, her taxable income ($200,000) falls in the fourth bracket where taxable income is between $100,000 and $335,000. This means that she needs to pay $22,250 + 39% of the amount over 100,000. Computing the tax of Moana, you can get $61,250 (($22,250 x 39%($200,000 - $100,000)). She should not incorporate her sole proprietorship because it will only make her pay more taxes. The tax savings she can have if she does not incorporate her business is $9,531 ($61,250 - $51,718.75).