That depends on several things. The fact that he lives in your house is not enough. Did he have less than $4300 of income in 2021 not counting Social Security? Did you pay over half of his support? If he cannot be claimed as your qualifying dependent then you cannot file as Head of Household.
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
**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.**
