Logic group-Complex Logic

Hi,

I need to map TAX accounts in data management
by the sum of all net accounts
I was thinking of doing it through a Logic group, but I want it to be mapped by FCCS accounts and not by their ERP accounts
so that they don't have to add accounts every time
I used to do it by adding a Lookup dimension, but now I don't see a way to add it
Do you have another idea how to do it?

Version (include the version you are using, if applicable):

Financial Consolidation and Close

25.01.31

Thanks