How to setup withholding tax invoice when it is borne by the company

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How to setup withholding tax invoice when it is borne by the company

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There are 2 types of withholding tax, one is to borne by supplier, the other one is borne by the company.

If it is borne by the company, the tax base should be equals to invoice amount * (1+ WHT rate/(1-WHT rate)) .

For example, supplier invoice amount is USD100 , WHT% is 10%. The tax base borne by company should be USD 111.11 and the withholding tax amount to tax authority is USD11.11

Furthermore, when it is a foreign currency invoice, the conversation rate must use the rate provided by tax authority, but the supplier invoice payment currency is follow the bank agreed conversation rate. The FX gain and loss will be bear by the company. How can Oracle paid to tax authority with another exchange rate and generate the journal entries that can clear the WHT payable(with the FX rate from supplier invoice)?