No Tax for COGS - No refund Account possible?

No Tax for COGS - No refund Account possible?

Hi. Initial test of Zoho for me. 

The statement import transaction matching is great, but I ran into problems on the first transaction. Can you help as below please. 

This is for Australia and using GST. 

eg.
Payment to   Vendor1 COGS - 10% Tax
Refund from  Vendor1 COGS - 10% Tax

**zoho does not record TAX for COGS Payments or Refunds in bank import. Further, I cant't see how to allocate a refund to the COGS category form the bank import.

Payment from Customer1 Sales - 10% Tax
Refund to    Customer1 Sales - 10% Tax

** Tax recorded, but refunds must be allocated as an unreleted expense account..

1. There seems to be no way to use COGS and Tax and no way to include it on the tax report. Does that mean you can not use the COGS category if you want to account for Tax on COGS?

2. No way to easily cut and paste the transaction details from teh import to make a rule. 

3. I want to see COGS/COGS refunds in their own category on the Profit and loss as well as Sales/refunds as income category so I can see what is going on easily.

4. Is there a way to sync statemnet from more than 90 days ago without manually importing?