Okay, testing server is working and I have bound the tax column in the add to cart server behavior.
I have added a calculation in the cart object: CATaxAmount =([Price]*[Quantity])*[CATaxable]
Now resulting in...
Parse error: syntax error, unexpected '=' in /home/hotvws/public_html/WA_eCart/eCart1_PHP.php on line 11
edited the line to
$itmObj->CATaxableTotal=$itmObj->Price * $itmObj->Quantity * $itmObj->CATaxable;//c
And now no error.
But after binding the taxable column to the add the cart button, there is no sales tax being added for any products whether 1 or 0 in the database column.