Austalian GST invoices

Does any add-on cater for Australian GST (10%) in the following scenarios?

I am mainly concerned about the customer invoice, I can generate the invoice to the vendor easy enough.

Marketplace operator registered for GST (always true)

Scenario 1
Vendor IS registered for GST
Some products include GST some don’t (the invoice must include the words Tax Invoice)

Scenario 2
Vendor is NOT registered for GST (and so none of the products include GST, and the invoice can not include the words Tax Invoice)

Scenario 1 requires

Monthly fee

  • invoice from marketplace to vendor includes GST
  • the invoice must include the words “Tax Invoice”

Transaction invoice

  • commision includes GST marketplace invoice to vendor includes GST
  • the amount of GST
  • the invoice must include the words “Tax Invoice”

e.g.

  • marketplace commission 5%
  • customer purchases
    1 item @ $110 includes GST
    1 item @ $50 GST free

invoice from marketplace(vendor) to customer $160 with seperate line stating includes $10 GST

invoice from marketplace to vendor $8 includes GST of $0.73

Scenario 2 requires

Monthly fee

  • invoice from marketplace invoice to vendor includes GST
  • the invoice must include the words “Tax Invoice”

Transaction invoice

  • commision includes GST
  • marketplace invoice to vendor includes GST with the words “Tax Invoice”
  • the invoice to the customer must NOT include the words “Tax Invoice”

e.g.

  • marketplace commission 5%
  • customer purchases
    1 item @ $110
    1 item @ $50

invoice from marketplace(vendor) to customer $160 (note no line saying GST included)

invoice from marketplace to vendor $8 includes GST of $0.73