People are complaining about a mail which claims that it is from Income Tax Department of India. And which will ask for your credit card details for refund.
Here is the mail screenshot
the link will take you a website with a url like http://xxx.x.xx.xx/gov.in/taxation/iti/india/index.php
Now that site is blocked by Opera and Firefox .
But remember this kind of mail can change the address and which will take some time to track. So better you not to enter card details to any untrusted websites, and check the url before you enter.
So as usual
1. Check the url before you enter any creditcard or bank details
2. Use Firefox, Opera or IE8 to access urls