It can be enormously difficult to calculate the tax due on these, particularly if some tax has already been paid in the other country.

It will then calculate your tax based on the difference.

I work in corporate tax compliance, helping business clients to calculate their tax liability.

The account will also add up your paid invoices and calculate the tax you owe.

Proponents offer studies that calculate the tax rate consistent with the legislation (23% inclusive), while critics argue that the rate would need to be much higher and offer competing estimates.