If you and your spouse are filing a Joint return, as you should be, then the children, under the age if 17 at the end of 2020, would be dependents if they live with you and would be eligible for the credit. A step-child is the same as your spouses biological child for tax purposes.
**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.**
