Considering the situation described above, what Miguel should do is to "<u>Request to fill out a new W-4 from his employer."</u>
<h3>What is W-4 Form?</h3>
The W-4 form is the form that is filled by the employee and submitted to the employer to show the filing status, numerous jobs modifications, amount of credits, other income, deductions, and any other amount to withhold from each paycheck to determine the amount of federal income tax to remove and withhold from the employee's salary.
Therefore given that Miguel just got married and is planning on filing his taxes jointly with his spouse, despite having already filled out a W-4 when he was first hired, then action expected from him is to "request to fill out a new W-4., from his employer."
Hence, in this case, it is concluded that the correct answer is option C.
Learn more about the W-4 Form here: brainly.com/question/15507745