Please help me with this
I'm working on an invoice that needs to be with with or without TAX because in EU you don't have to pay VAT if buy online from a different state but you pay vat if you are visiting a state and buy stuff.
So it should be default without VAT but add VAT if you need to
I probably need to use IF and Else function but can't figure it out.
the fields of database are
product description, quantity, unit price, total (quantity * unit price) and the next should be VAT (unit price * 0.19)
The last field I need to be default ZERO but also should be drop-down list maybe to choose between 0 and VAT.