no sales tax on specific charge

I have added a charge to ecart for a $5 donation for breast cancer awareness month but I do not want tax charge on this donation. Can you please tell me what to add to the following to have tax not charge on this donation? Thank you.

//eCart Rule
function WAEC_cali_cart_NationalBreastCancerFoundationDonation() {
$totalCharge = 0;
if (true && ((sizeof($this->Items) > 0) && ((isset($_SESSION['breast'])?$_SESSION['breast']:"") == "1"))) {
$totalCharge += 5.00;//Result
}
return WA_eCart_FormatNumber($totalCharge, $this->ForceDecimalsC, $this->DecimalPlacesC);
}
//eCart Rule

to have taxable and non taxable items in the cart, you will need to add a new column to the eCart object named taxable


in the add to cart button, set the value for the taxable column to 1 for items that should be taxed and 0 for items that should not be taxed

Then in the eCart object, set the tax rule up on the tax tab.

Set the trigger to "Number of items With A Specific Column value":
If the total Number of items where 'taxable' has a value of '1' is '>' than a value of '0'


Set the calculation to "based on items with a specific value":
Total of 'TotalPrice' where 'taxable' has a value of '1' 'times' '.10'

replace '.10' with the correct tax rate you wish to use.

If I add this column do I need to re-add all of my add to cart buttons on the many pages of static products? i.e. if I add this column to the cart and then have all of my product page having old add to cart behaviors that do not include this column will there be a problem? Can I set the default taxable universally to "taxable"? I only need this one item (the donation) to be untaxed. Thank you.

Yes, you will need to edit the add to cart buttons on all your page.

no there is not a way to do this universally.

I am thinking I could do a global find & replace through Dreamweaver as follows -

Find:
$ATC_itemdiscountable = "";// column binding

and replace with:
$ATC_itemdiscountable = "";// column binding
$ATC_itemtaxable = "1";// column binding

that code will not be added to your pages until you edit the add to cart button behavior.

you will not be able to find that line because it will not exist yet, and tat is not the only change that will be made on editing the add to cart button behavior.

One last thought. I am already setting a session variable "breast" to trigger the charge for the donation. Is there not an easier way to simply add to the tax trigger if session "breast" equals "1" then no tax? Thanks.

doing it that way would cause no tax to be applied if the donation is in the cart and another taxable item is also in the cart, surely you would want to be able to tax the taxable item if they add both to the cart?


the way to handle taxes for specific items is to add the taxable column and mark the items as taxable or not.

that allows you to add both the taxable and non taxable item to the cart at the same time and apply the appropriate tax based on the subtotal of the taxable items.