printing of tax code on invoice

Dear all,

situation:

with transaction code FTXP some tax codes have been defined. These tax codes are for 'internal' use.

Condition type:

NLXA     21% -

NLXV     21%

On the printout of the (consignment invoice) this is printed like:

In the end the tax amount = 0 EUR

Now the goal is to print like 'Tax   0%'

How can i achieve this?

Thanks!

Mark