Some newbie questions

[Gerald Lopez]

I have gnucash 1.8.12 running on ubuntu 6.06. I set up a business account
using the wizard, and would be grateful for ideas on the following:


   1. I have to account for tax (GST in New Zealand) on virtually all
   transactions. This works fine with Invoices and Bills from the
   Business>Customers> menu; but when I do simple transactions using my current
   (or checking) account, there doesn't appear to be any provision for GST, and
   transactions in that account don't update the GST tax account like Invoices
   and Bills do. Do I need to create Vendors and Customers for all my
   transactions in order to reflect GST apportionment?
   2. Is GST and Income Tax an expense, as assumed by gnucash wizard - or
   is it a drawing, as assumed by a local proprietory software (Cashbook
   Complete)? If I continue with it being an expense, it looks like I will need
   to deduct the taxes from the totals when I create reports.
   3. How do I changed my Invoice heading to the legally required "Tax
   Invoice", and how do I change "Tax" to "GST" in the table?

Thanks very much.

Cheers,
Gerald.