How to get all active Tax rules

Question

I have added tax rule in

sales -> manage tax rules

and associate with customer tax class.

Now how can I programatically get this rules or fetch all the rules defined here ?

I tried this

$tax = Mage::getModel('tax/calculation')->getCollection();

            foreach($tax as $rr) {
                 echo $rr->getRuleName();
                 echo $rr->getRuleId();
                 echo '<br>';
            }

but getting blank

Answer 1

Try this

$collection = Mage::getModel('tax/calculation_rule')->getCollection();
if($collection->getSize()) {
    $collection->addCustomerTaxClassesToResult()
    ->addProductTaxClassesToResult()
    ->addRatesToResult();
}
if($collection->getSize()) {
    foreach($collection as $rule) {
        print_r($rule);
    }
}

Answer 2

If you want to load by id:

$taxRule = Mage::getModel('tax/sales_order_tax')->load($id);

or get all:

$taxRules = Mage::getModel('tax/sales_order_tax')->getCollection();

foreach($taxRules as $taxRule){
    echo $taxRule->getId();
//etc
}