Some invoices can contain a mix of taxable and non-taxable items. To handle these kind of invoices the app allows splitting an invoice into 2 separate lines - one line representing the tax inclusive items and one line representing the non-taxable (zero rated tax) items.

To split an invoice into 2 lines by tax amount select the "Split By Tax" menu item.

This will bring up the dialog shown below. Please enter the tax amount and select a zero and a non-zero tax rate. The app will calculate the line amounts that will result in the desired tax amount.