India localised Tax Setups - I can understand using the TDS via the localisations but can I use the

 I am currently in the process of setting up taxes for India, more specifically, we only need to capture AP taxes right now so that is where I am focussing my efforts. We are doing this remotely so have very limited exposure to any indian tax experts to guide us through this process.

I have set up both the Service and VAT taxes that are calcualted by creating a 'MISC' line in the invoice rather than a tax line and I have the TDS taxes working fine, basically the witholding tax.

I am presuming that this indian localized tax solution was built originally for 11i and was simply brought over to R12 with little changes. I can understand that the TDS taxes cannot be calculated using the eTax engine, but surely I can use the eTax engine for the VAT and Service type taxes that are charged on the invoices received rather than the quite old solution that the localisation uses!