The W-4 you give an employer does not go to the IRS nor does it dictate how you have to file your tax return. It just tells the employer how much tax to withhold from your paycheck. If he is single then that is how he should file. He may have had too little withheld, and could end up owing tax.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
