I was born in Australia but moved to NZ when I was 7. I have been living in NZ for 22 years and want to move back with my husband and 2 young boys. Would we be entitled to any family assistance?

You'll be entitled to family assistance payments if you are working in Australia: http://www.familyassist.gov.au/

However, you may not be entitled to any other social security payments from Centrelink, as your family would need to be Australian permanent residents or citizens for this.