How to Create the Tax Rule to Exempt the Tax Calculation of AP Invoice based on DFF Value?

How to Create the Tax Rule to Exempt the Tax Calculation of AP Invoice based on DFF Value?

Hi ,

I am working on implementation which loading the data from legacy system(other than oracle) to Oracle EBS.

I need to do conversion of all AP Invoices to Oracle EBS, For that I maintaining the Invoice data of legacy with DFF Value as Legacy. Requirement is to exempt tax for those AP Invoices.

My Question are:

1. How to create Tax determining factor based on AP Invoice DFF? Which Factor set can be used and how?
2. Please help with ETE.