Posting tax on two accounts

Hi everyone.

I have the following business scenario:

- Invoice consists of several items

- One of those items is a subject to a special form of tax where the tax amount should be posted to one general ledger account, and at them same time the negative amount should be posted to another general ledger account

I have configured the tax indicator (FTXP) and assigned the two general ledger accounts, each to separate tax categories.

But, in FQC1 (posting area 0010, Tax on Sales/Purchases) I can only define one general ledger account for the tax indicator.

Is it possible to follow this scenario in IS-U? Any ideas would be appreciated.

Thanks in advance!

Marko