Sales Tax on Gift Cards

In my state we don't charge sales tax on GIft Cards but on everything else. I understand that I cannot exclude 1 product from being charged sales tax in MP, but I have also understood that perhaps a filter could be applied to the tax section to exclude a particular item.

Can someone give me a guidance in this?

$tax_prices = array();
foreach ($selected_cart as $bid => $cart) {
$content .= apply_filters( 'gift', '' );