EBTax Configuration 0% with two lines of distributions (+15% and -15% with different accounts)

Hi:

We have applied the following patch: EBusiness Tax Seed Data [ID 463001.1]

This patch uploaded to EBTax all then information related to the EURO countries taxes information.
For Luxembourg we have the following scneario:

Actually EBTax is calculating 0% (TAx Code: LU VAT ZERO RATE) but with only two lines of distribution with 0 value. :
1) Recoverable Tax with value 0%
2) Nonrecoverable Tax with value 0%

But what the business wants is:

Tax Rate: 0% With two lines with differente combinations:
1) +15% with a Collectible Account
2) -15% with a Deductible Account

We need to know how this scenario need to be configured in EBTax.

Thanks.
Marco