Tax determination in CRM for Argentina (IVA)

Currently in R / 3 the value added tax VAT is determined by the type condition J1AU with the J1AV access sequence (Arg: VAT); this sequence has 1 access for Table 395 (Arg: Country / Fisc.Type) with the following fields (COUNTRY: ALAND - TYPE OF TAX: J_1AFITP). In CRM at the level of BP it appears as obsolete J_1AFITP (included in the field group 246). This creates difficulties because we can not determine the value of J1AU condition as is done in R / 3. Anyone can guide on how to solve this problem?

Thank you very much.

Paul.