WITH HOLD TAX

  Like Client requirement is  

TAX->18% 
TAX->3%

So he needs tax calculation like take as 1000 rs

->1000*18/100=180
1000-180=820
820*3/100=24.6
820-24.6=795.40-------------------this is client requirement ????So this can be done in WITH HOLD TAX GROUP WE CAN DEFINE %like 18+3+etc

BUT CALCULATION WILL COME  1000*18/100=180
                                                   1000*3/100=30
                                                   1000-(180+30)=790--------------------------------------initial calculation will come like this   if we have done WITH HOLD TAX GROUP ,but client requirement is the above one 795.40 is there any way to get like this pls check & revert in case if you found any solution .