EBS Tax setup under Project billing?

Dear Colleagues,

In our EBS suite instance we have project module from witch we are preparing the AR invoice to be transferred to AR later on.

as now we are planning to implement the VAT for KSA so we have to prepare our AR invoice including the 5% TAX

Questions:

is it possible to setup the EBS tax into project module so the AR invoice will include automatically the VAT tax during generation?

if yes , How?

if not what is the best practice to generate the AR invoice with the VAT ?

Note:

actually we are generating the AR invoice from Project module without VAT and it's working fine as expected