Answer :
They should use Form W-4, which is the correct form. If your employer gives you a W-9 instead of a W-4 when you start a full-time job, that may indicate that they hired you as an independent contractor rather than an employee, and you may be responsible for making tax payments to the IRS.
Use Form W-9 to give your correct Taxpayer Identification Number (TIN) to anyone who needs to file a report with the IRS about something that was paid to you, like:
- Income.
- Real estate dealings.
- You paid mortgage interest.
- Purchasing or giving up secured property
- A debt cancellation.
- The IRA contributions you made.
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