geri wrote: 
Hi g,
Welcome to Benefits and Work
I am not quite sure what "Change of Circumstances Form" that you are referring to.
Can you please elaborate by replying to this topic, we may then be able to help further !
Changes of Circumstances are generally reported to DWP in the form of a letter to the relevant DWP Dept : e.g. ESA, DLA, PIP etc.
Sending Documents to the DWP, ATOS, Capita or Maximus. bro58