Context:

I have a supplier with a given tax regime = B

I have a product/service with a given tax rate = nn ( for the default national tax regime = A )

I set set mapping tax rate on tax regime = B as

when tax rate = nn  then tax rate (for the tax regime I am in) = 0n

I also set the flag 'detect automatically'  yes , country was set as well as zip code from (0) to (9999)

When I enter a supplier bill for this supplier having tax regime = B using product/service , the tax rate does not change to the expected mapping target tax rate = 0n

Is this working ?  am I missing some additional set up?

thanks - rgds - JLD