Thanks for your replies. Its all so confusing. My DH is a tradesmen who works for himself...last financial year his taxable income was $21000 but gross income was $50,000 this is the part I dont understand.
As I said in my previous post, if current circumstances are the same as they were for the most recent tax return, Centrelink will use those figures to calculate his income. If the net income from your husbands business was $21000, this calculates to about $807 per fortnight which is below the partner income free area - if this is the only income, you should be entitled to max rate Parenting Payment Partnered

Also - be prepared to make a few visits to the Centrelink office to take documents in - your circumstances are a little more complex than most people's so it may take a little longer than usual to be assessed. Claims for Parenting Payment Partnered are ideally finalised within 28 days of lodging the claim

BG - Yep - any day now!! Very exciting and loving being on mat leave so far! Managed to work up until 37w4d so I can have as long as possible at home with bub