For 2020 the standard deduction was $18,650 Head of Household (probably slightly more for 2021) so your income has probably not crossed the threshold to require withholding. Your employer does the withholding so they should be able to tell you (the person you asked probably does not do their payroll).
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
