How to Write a Query to get the tax code with respect to Tax Type

HI ALL

i am already write a code to get the total tax value to display in PO Confirmation report in morphx reports, i want to know how to a query to display the individual tax types in the fetch method.

it means that in the taxtable there are five different kind of tax types are there and each tax type has N Number of tax codes.

i need to display the individual tax values in the report like VAT,CST,Excise, SalesTax,Service Tax

Can any one know about this please let me know.