Get your taxes done using TurboTax

If your son's father is claiming the child, how are you filing as Head of Household?  Do you have another child who is your dependent for Head of Household status?  In order to file HOH you must have a blood-related dependent.  As for your W-4, that is a form you give your employer to affect how much tax to have withheld from your paycheck.  It does not dictate how you file your tax return, nor is it sent to the IRS.  

To be sure you are having enough withheld try the W-4 calculator:https://turbotax.intuit.com/tax-tools/calculators/w4/

Am I Head of Household?

https://ttlc.intuit.com/questions/1894553-do-i-qualify-for-head-of-household https://ttlc.intuit.com/questions/2900097-what-is-a-qualifying-person-for-head-of-household

If you qualify as Head of Household, when you enter your filing status (single or married filing separately) into Personal Info, and then enter your qualifying dependent, TurboTax will offer HOH as your filing status.

**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.**