Magento CRON set Tax Class ID

README.MD

Untested Magento Code To Makesure All Products in the database have a Tax attribute set.

config.xm

<?xml version="1.0" encoding="UTF-8"?>
<!-- html/app/code/local/Yourname/Tax/etc/config.xml -->
<config>
   <modules>
      <Yourname_Tax>
         <version>0.1.1</version>
      </Yourname_Tax>
   </modules>
   <!-- -->
   <crontab>
      <jobs>
         <Yourname_Tax>
            <schedule>
               <cron_expr>*/05 * * * *</cron_expr> <!-- Every X Minutes Update As Needed-->
            </schedule>
            <run>
               <model>Yourname_Tax/observer::updateTaxRates</model>
            </run>
         </Yourname_Tax>
      </jobs>
   </crontab>
   <!-- -->
</config>

Observer.php

<?php
//  app/code/local/Yourname/Tax/Model/Observer.php
class YourName_Tax_Model_Observer {
		public function updateTaxRates(){

		$productCollection = Mage::getModel('catalog/product')->getCollection()
		->addAttributeToSelect('tax_class_id');

		foreach ($productCollection as $product) {
			$taxClassId = $product->getTaxClassId(); 
			if (($taxClassId != '1')) {  
			//You can change the logic here
				
				$product->setData('tax_class_id', $store_id)->getResource()->saveAttribute($product, 'tax_class_id');
				usleep(20000);//0.02 seconds to keep database from being locked
			}
		}
	}
	
}