Open Cart does not provide native support for Compound Taxes (tax on taxes). So if you're opening a store in Canada (Quebec , or PEI) require this, and I think India might have areas which also have this requirement (maybe other areas of the world ? If you're aware of any please let me know so that I can make the extension easier to find for your fellow countrymen). In any case, this extension provides support for taxes which require compounding to calculate correctly.

~Every tax will now have an option in the admin panel if it should be calculated based upon total, or compound itself based upon existing tax sub-total.

THIS MODULE REQUIRES VQMOD 1.2.3 OR LATER

SEE ADDITIONAL SCREENSHOTS FOR MORE INFORMATION