Considerations. If you have not filed a W-4 with your employer showing that you are exempt from federal tax withholding, the payroll department might have made an error. Check with your employer or someone in the payroll department as soon as possible to correct the error.f your employer shows you as exempt from federal taxes, it means that he is not withholding taxes from your paycheck. Although some employees are exempt, most are not.
The PhD in social work is strictly for research. You do not get more clinical training and thus the MSW is the terminal degree for professional practice. A social work PhD will not have any more clinical training than an MSW.
To be a social worker you need at least a bachelor's degree, generally in social work (BSW), but some employers will accept a bachelor's degree in another subject such as psychology. It generally takes four years to complete an undergraduate degree program.