Admin Invoice question

Now - maybe I am having a senior moment - please feel free to says so.

I receive an order, and on orders page it is status 'pending'
When I receive a cheque I edit the order and add an 'update'
status comment 'cheque received an xx/yy/zzzz'.
A few days later the cheque clears at the bank, I see it in my account so I set the status to 'delivered' and a comment with the cheque clearance date. I then print an invoice to include in the package with the product.

Now here's the question -

Why at the bottom of the invoice is only the 'pending' status shown?

What did I miss?

Also where can I acces the text that shows the invoice column headings, I want to change 'Model Tax Price (ex)...' to say VAT instead of TAX
Any advice greatfully received.

For the display of the comments on the Invoice and Packing Slip check the settings in the Configuration ... Shipping/Packaging ...

Display Order Comments on Admin Invoice
Do you want to display the Order Comments on the Admin Invoice?
0= OFF
1= First Comment by Customer only
2= All Comments for the Order

Display Order Comments on Admin Packing Slip
Do you want to display the Order Comments on the Admin Packing Slip?
0= OFF
1= First Comment by Customer only
2= All Comments for the Order

Thanks Ajeh - I new it would be something simple I missed.

ANy one any ideas on the location of the text string to change?

:D
I found it in \admin\includes\languages\english\invoices.php

define('TABLE_HEADING_TAX', 'TAX');

changed to

define('TABLE_HEADING_TAX', 'VAT');

Should this be in a custom override?