title: Issue in tax configuration After magento upgrade
body: <p>I have upgrade magento from v1.4 to v1.9.<br>
  after successful upgrade magento, I have issue with tax configuration.<br>
  magento dashboard shows below error.    </p>
  
  <ol>
  <li><p>Warning tax discount configuration might result in different discounts than a customer might expect . Please see source for more details.Click here to go to Tax configuration and change your settings.    </p></li>
  <li><p>Warning tax configuration can result in rounding errors for store(s) : PL Germany(PL Euro Wholesale English), PL Germany(PL Germany Wholesale), PL Germany(PL Germany Retail), PL Germany(PL Euro English). Please see source for more details.Click here to go to Tax configuration and change your settings.   </p></li>
  </ol>
  
  <p><img src="https://i.stack.imgur.com/PHB0e.jpg" alt="magento tax issue"></p>
  
  <p>Please help. Thanks.</p>