Compute the 2018 tax liability, the marginal, and average tax rates for the following taxpayers. Click here to access the 2018 tax rate schedule. If required, round the tax liability the nearest dollar. When required, round the average rates to four decimal places before converting to a percentage (i.e. .67073 would be rounded to .6707 and entered as 67.07%). a. Chandler, who files single, has taxable income of $94,800.