When adding a Sale to a ticket , select item to sell, System will go to inventory bring up price of item and auto add tax assigned to it's category, so item price on SALES transaction edit form is shown INCLUSIVE of tax (VAT). Entering a selling price manually should be entered inclusive of VAT tax amount. System will automatically calculate VAT tax from manually entered amount.
Prices of Extra charges on SALES transaction edit form are EXCLUSIVE of tax, but will show / print INCLUSIVE of tax on customer receipt
Manual modifications or entries of a selling price for a sales item must be inclusive of tax
Sale transaction Adjustments made on the Customer's ticket/receipt/invoice are entered inclusive of tax. A manual amount entered is considered inclusive of VAT tax. Percentage adjustment will automatically calculate and deduct the VAT tax
VAT taxes are printed/reported separately by tax1 and tax2 on Daily report and Taxes report when both tax rates are entered separately in store setup. So the shop can know tax amounts due for each rate.