My daughter is 4 years old and her birth certification say's a different name from her bio dad how can I remove him from the birth certification?? And have her bio dad name put on

This is in ca

First its not a good idea to piggyback your question on another thread. This can lead to confusion. So I've moved your question to its own thread.

You and the bio dad has to go to court to establish paternity and request a modification of the birth certificate.

If CA means California then you will be out of luck! There is 2 year statute of limitation for paternity contest.
If Ca means Canada then it will depend on your provincial laws.