thanks for your help it does not seem to have a tax price

How would I add the tax price to the $product_links array?
it currently has:
$product_links = func_search_products(
array(
"from_tbls" => array("product_links"),
"query" => " AND $sql_tbl[products].productid = $sql_tbl[product_links].productid2 AND $sql_tbl[product_links].productid1 = '$productid'"
),
$user_account['membershipid'],
"$sql_tbl[product_links].orderby, product"
);