It sounds like you were never married to the mother, but you had a child together. Florida Department of Revenue as a matter of routine enforces child support but does not do anything regarding child visitation. Even though your paternity is not in dispute you need to establish your legal paternity through the court system. The process centers around a Petition to Determine Paternity and Related Relief. The related relief is visitation. There are several other forms that must be filed along with that petition. The process is similar to a divorce, but for people who were never married and had a child together.