Tax Groups in R12

Hi

I want to create Tax Groups in R12. I have following requirement kindly suggest how can i do this in E-Business Tax.

I have created 3 tax names i.e. Tax Code1, Tax Code2 & Tax Code3 and I want to use these tax names in two TAX Groups (i.e. TAX_GROUP_1 & TAX_GROUP_2) as like below.

e.g. :- In TAX_GROUP_1 ;-  Tax Code1

                                            Tax Code2

                                            Tax Code3

       In TAX_GROUP_2:-      Tax Code1

                                            Tax Code2

While creating the transaction in AR, Tax Groups should be visible in Tax Classification Code field and when i will select TAX_GROUP_1 system should calculate the Tax amount for Tax Code1, Tax Code2 & Tax Code3 together and the TAX lines for these 3 tax names should be visible in Tax details window.