Tax module in Magento

Tax module is one of coremodules in Magento and it includes Block, Helper, Model, ect andsql file structures.The table schema is in the sql directory andtable tax_class,tax_calculation_rate,tax_calculation_rule and tax_calculation are created for thismodule.

Table tax_class: define the class name andclass type;

Tabletax_calculation_rate:definethe taxrate and location relationship;

Table tax_calculation: define the relationship betweentax rule, tax rate and tax class.

There are three files in the ect directory:config.xml, system.xml and adminhtml.xml.

config.xml isused fortax module's configuration;

system.xml isused toconfigure the values byadministratorinterface;

adminhtml.xmlis used tocreate menu in the admindashboard and callcorresponding actions.