I'm the biological father the baby is 4months. I want to be added to the birth certificate and change the name. The mother is okay with it. How do I go about this?

You go to court and get the courts permission. While your there set up visitation and support.

I'm the biological father the baby is 4months. I want to be added to the birth certificate and change the name. The mother is okay with it. How do I go about this?

File Acknowledgment of Paternity.