Beth and Jay Project the Following Taxes for the Current $\begin{array}{lr}\text { Regular tax } & \$ 50,000 \\\text { AMT } & 10,000 \\\text { Self employment tax } & 12,000\end{array}$

Essay

Beth and Jay project the following taxes for the current year:
$\begin{array}{lr}\text { Regular tax } & \$ 50,000 \\\text { AMT } & 10,000 \\\text { Self employment tax } & 12,000\end{array}$ How much in estimated tax payments (including withholding from wages and quarterly estimated payments) should the taxpayers pay this year in order to avoid underpayment penalties under the following assumptions regarding the preceding tax year?
a. Preceding tax year-AGI of $140,000 and total taxes of $36,000.
b. Preceding tax year-AGI of $155,000 and total taxes of $48,000.