If there are circumstances in which you need to adjust the default VAT rates applied to treatments or expenses, you can manually change the VAT rate using a dropdown list of your current active VAT rates when you:
Create an Expense:

Or Create an Invoice:

You can only use a predefined rate that you have already created in Settings -> Invoice, you can't over-type either the rates or the amounts for either an expense or an invoice.
Create an Expense:

Or Create an Invoice:

You can only use a predefined rate that you have already created in Settings -> Invoice, you can't over-type either the rates or the amounts for either an expense or an invoice.
Published on: 25 / 11 / 2020