Hi All
AFAIK 365 Sales does not automatically calculate tax on quote lines. So I'm thinking of adding some logic to create a calculated field. To make it more like Business Central, I'd add a tax code to Account entity and Products. If both the Account and Product are taxable then look up a rate table for the tax rate. Products are synching from Business Central so Tax Code (VAT/GST Group)will be there from the sync. If this is too complicated then a simple logic like line Amount X .1. I'm not sure if this can be achieved from configuration or need Javascript.
One problem I see with this kind of custom logic is handling rounding as ultimately quote will sync back to BC