Maxine is separated from her husband and will file Married Filing Separately on her return. She worked as an enrolled agent for an accounting firm last year for a salary of $225,000. Since Maxine made over $200,000 in 2019, her employer withheld the additional 0.9% Medicare tax. Which of the following is correct? a) She is due a Medicare tax credit of $225. b) She owes an additional Medicare tax of $900. c) She owes an additional Medicare tax of $675. d) She owes no additional tax and is not due any credit because her employer withheld additional Medicare tax