"National Currency instead of Local Currency" in RFUMSV00

Hello,

Has somebody experience with the above check box ? According to the F1 help:

Print in country currency of tax code

The tax return is not to be made for the tax authorities in the country of the company code.
This means that the return can be made in the currency of the country defined in the tax code.

Note

This field can only be maintained if you have activated "Plants abroad".

I understand that the report will not be output in company code LC1 but in currency defined for the country in OY01 where you can also specify a exchange rate type.

My question is: will the system use a historical exchange rate (i.e. each line item will translated into country of the currency using the rate valid on the posting date) or will the system use a "flat" rate (i.e. the valid rate on the day the report is run) ?

Thanks and regards

Th.