Wan’s AGI last year was $200,000. Her Federal income tax came to $65,000, paid through both withholding and estimated payments. This year, her AGI will be $300,000, with a projected tax liability of $50,000, all to be paid through estimates. Wan wants to pay the least amount of tax during the year that does not incur a penalty.

a. Compute Wan’s quarterly estimated tax payment schedule for this year.

b. Assume instead that Wan’s AGI last year was $100,000 and resulted in a Federal income tax of $20,000. Determine her quarterly estimated tax payment schedule for this year.