On sales order line tax classification code to be updated as per bill to address

Hi Support,

I have received the business requirement , that on sales order line tax classification code to be get updated auto on the basis of bill to address of customers. i.e. we have to 2 TAXES one is IGST and CGST+SGST. If billing address is out of state the system should pick the tax rates related to IGST and if the billing address is with in the state than system should pick the CGST+SGST related to tax rates.

Note for every items we have different tax rates for CGST+SGST and IGST.

We are using R12 - 12.13. version. We have define the tax rate code at E-Business Tax module.