AGIS Transaction Tax Calculations

Hi,

We are using Taxware only for O2C.   For  P2P,  std E.B.Tax application is used.   We maintain a separate set of Regimes for P2P  and  O2C.

When an AGIS transactions are created,  the expectation is that the 'Tax calculated in AR'  is also defaulted in AP.    Our issues are two fold.

a)  When the tax for AR Invoice is calculated through Taxware.    We get a default zero tax rate belonging to the P2P regime as well, along with the taxware calculated taxes.     This, I think,  we can stop by setting the 'Applicability'  rule  to 'No'  based on the 'Transaction types'.   My question is,  is there any other option by which this can be done?