Employees must provide Form W-4 to the contractor:

Employees must provide Form W-4 to the contractor:

• A. When they start work
• B. At the completion of the project
• C. During annual performance review
• D. Upon request by the employer

Answer: (A)

Form W-4 is used to tell the employer how much federal income tax to withhold from an employee’s pay. It needs to be provided at the start of employment so the correct withholding can begin with the first paycheck. If you wait to give it, the employer must withhold using a default, often higher, amount until a W-4 is received, which can lead to inaccurate withholding. The form governs withholding timing, not project milestones or performance reviews, and while an employer can request it, the standard practice is for the employee to supply it when work begins. If circumstances change, a new W-4 can be submitted later to adjust withholding.