If the child does not live in this county and the whereabouts are not being concealed from you, you may have to file your case in the county of the child's residence. If there is an issue about whether someone is actually the biological father, the court may order paternity blood tests, which are highly accurate. If you move during the action, you must tell the court your new address. This packet and instructions are available as a service to the community. They are not a substitute for legal advice.
Many people also find self-help law books helpful.