How do we pass company code value to an AR DFF

Summary

Need ability to derive multiple company codes on the AR tax line

Content

In AR we derive the company code on the tax distribution line from the AR transaction type, meaning we can only derive a single company code for a business unit.

We have business units and legal entities with multiple company code values.  For legal entities with a single company code assigned we use an SLA mapping between legal entity and company code to derive the correct company code on the tax line in AR.

For business units with legal entities with multiple company code values we cannot use this approach but am trying to find a way to pass the company code value to the AR interface table that can then be used in an AR SLA rule to update the company code value on the tax line - or any other way of deriving the correct company code?