Rewrite the code or copy code from app\code\core\Mage\Sales\Model\Order\Pdf\Invoice.php to app\code\local\Mage\Sales\Model\Order\Pdf\Invoice.php line 78.
These Labels are coming from Mage/Sales/etc/config.xml between line 1443 and 1480
I am not sure where in the admin section they are present, if they are present there.
But you can always change them from .csv files
For example, I did it from here
app/locale/en_US/Mage_Sales.csv
like this
"Shipping & Handling","Delivery"
"Shipping & Handling","Delivery"
Vinothavn, thnx for your answer. I looked into the coding and tried it, but unfortulnately it didnt work. But I altered some other code in the same file and that did work. I changed this:
Best Answer
Rewrite the code or copy code from app\code\core\Mage\Sales\Model\Order\Pdf\Invoice.php to app\code\local\Mage\Sales\Model\Order\Pdf\Invoice.php line 78.