Your W-4 does not dictate how you file your tax return. It only goes to your employer to tell them how much tax to withhold from your pay. If you do not have any dependents then you will not be able to file a tax return as Head of Household. You will file as Single. Check to see if you are having too little withheld. If your employer thinks you have children who you will be claiming as dependents on a tax return they might not be withholding enough tax and you could end up owing at tax time.
https://ttlc.intuit.com/community/tax-topics/help/what-to-know-about-the-new-2020-irs-form-w-4-emplo...
https://www.irs.gov/pub/irs-pdf/fw4.pdf
https://www.irs.gov/individuals/tax-withholding-estimator
**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.**
