You are the CPA who prepares the tax returns for Don, his wife, Mary, and their two

Question:

You are the CPA who prepares the tax returns for Don, his wife, Mary, and their two corporations. Don owns 100% of Pencil Corporation’s stock. Pencil’s current year taxable income is $100,000. Mary owns 100% of Eraser Corporation’s stock. Eraser’s current year taxable income is $150,000. Don and Mary file a joint federal income tax return. What issues should Don and Mary consider with respect to the calculation of the three tax return liabilities?