Centrelink - parenting payment... How to have it stopped

Hi IM's
I'm currently working part time and receiving part payment of the single parent pension. I'm intending on returning to work fulltime at the start of the new financial year. I want to stop receiving the pension regardless of whether I am still entitled. How do I go about doing this? I have checked the human services website, there is a lot of information on how to get the payments, but not a lot on how to stop them. Any help or advice would be very helpful.
Thank you