Hey there,

Punkin is right, 18 yo (or end of school year whichever is the later) unless child in question leaves school to pursue paid employment past age 16 then it ceases in certain circumstances.

If you require support for the child beyond 18 yo or schooling, whichever later, you need to seek an order from the Family Court for adult child maintenance. Generally speaking you have to prove that 1. Your or your child needs $ assistance and 2. that dad has capacity to pay.

Once the order is made you can give a copy of the CSA and ask them to collect it for you. So in a way Katones is right too.

You would need to get advice from a soli about your prospects of succeeding in court for an order for adult child maintenance.

Good luck.