Google Product Listing Tax Info Format

google_product_tax_info.xml

<g:tax>
   <g:country>US</g:country> //The country an item is taxed in (as an ISO 3166 country code)
   <g:region>CA</g:region> //The geographic region that a tax rate applies to, e.g., in the US, the two-letter state abbreviation, ZIP code, or ZIP code range using * wildcard
   <g:rate>8.25</g:rate>  //The tax rate as a percent of the item price, i.e., number, as a percentage
   <g:tax_ship>y</g:tax_ship> //Boolean value for whether you charge tax on shipping, y for yes or n for no - the default value is n
</g:tax>