Compatible with magento community 1.5 and above
Click here to check how to install magento extensionMagento Extension Installation Guide
What can I do with taxrate using this extension?
Ans: To set the same tax Tax Rate for Multiple Countries together at once, so you not need to set same Tax rate one by one to each country.
Does this work for set up the Tax rate for Multiple State as well?
Ans: No, it doesn't work for this, we will include this feature in our new version shortly.
Will it delete OR update the Taxrate for all seleted countries at once if I do?
Ans: Yes, it will work for the same.