Tax - Tax Rules - Tax clasificacion code

Question

Hi everyone,
I'm re-implantant a eBS 12.1.3 from eBS 11i
I have setup EB Tax with a unique tax regime which has various tax defined... each tax has associated an unique tax status and each tax & tax status have associated various tax rates... Then, If I want to use "TAx Clasification Code" field from AP or AR invoices then I have to define one tax rule for each tax rates and I have created three tax rules and when I created a invoice and validate it (f.e, in AP) , system generates three tax lines...
Then, I suppose that the use of tax rules is for creating tax lines simultaneous, namely, a invoice could have various tax simultaneus.
So, If each invoice has generally an unique tax line, I suppose that I can only define an unique tax rules and then, I can only define an unique tax and I create all tax codes of 11i like tax rates associated a unique tax.
For example:
Now, I have defined:
Tax Regimen: tax : Tax status: tax rates: Determine Tax Rate (tax rules):
ES TAX SUPPORT VAT STANDARD VAT 18%, VAT 8%, VAT 0% 3
RENTING VAT STANDARD RENTING VAT 18%, RENTING VAT 4% 2
IGIC STANDARD IGIC 5% 1
Then, I have created three tax rules (one for each tax) and each tax rule has associated "Determine Tax Rate" rules for each tax rates.
When I created Ap invoice and validate it, system creates three tax lines...
Should I create an unique TAX with many tax rates as tax codes in 11i?
Tax Regimen: tax : Tax status: tax rates: Determine Tax Rate (tax rules):
ES TAX VAT STANDARD VAT 18%, VAT 8%, VAT 0% , RENTING VAT 18%, 6
RENTING VAT 4% , IGIC 5%
What is you oppinion??
Best Regards,
Ricardo

Answer 1

How could I reply same functionality which I have now in eBs 11i?? namely, when I created one invoice in 11i, system fill tax derived of customer/supplier...however, it can not be replicated in R12.
How could I do it?
Please, Can anyone help me define it?
Best Regards