Compound Tax

Hi Guys,
Is there any workout to calculate a tax after calculating a first tax
Suppose the VAT is calculated in the Invoice and there is a requirement to calculate Price+VAT=SubTotal+Another TAX= Total
I am getting ready for another tax being planned in this part of the world as Sales Tax in addition to VAT

The only way is to define a multi-component custom tax code. This is described in the Guide about using tax codes.