Maybe. If your child lived with your BF all year and the child cannot be claimed by someone else, your BF may be able to get the $500 credit for other dependents by claiming your son. BF cannot get Head of Household filing status, child tax credit, earned income credit or childcare credit because the child is not related to him. The $500 credit is it.
IRS interview to help determine who can be claimed:
https://www.irs.gov/help/ita/who-can-i-claim-as-a-dependent
https://ttlc.intuit.com/questions/3113432-who-can-i-claim-as-my-dependent
https://ttlc.intuit.com/questions/4499708-what-is-the-500-credit-for-other-dependents-family-tax-cre...
**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.**
