You can define these minimum amounts for each tax processing key by choosing the Customizing path for maintaining minimum amounts per tax processing key. You can create several entries with different ‘valid-from’ dates for one particular tax processing key.

When you enter a tax code that uses a tax processing key where a minimum is defined, the system checks the calculated amount for this tax processing key against the minimum amount. If the calculated amount is below the minimum amount, a warning is displayed. The user then has to reset the document and change the tax code before posting the document.