Currently as per design, it can be achieved with 2 lines. Let's say we've posted an intercompany transaction between USMF and USSI. In USSI, we have a balance of 100.00 debit for Intercompany receivable account 123. In USMF, we have a balance of 100.00 credit for Intercompany payable account 999. In the elimination rule, we would create two entries. One to eliminate 123 and a second line to eliminate 999 in the consolidation company. This would create a journal with a credit to 123 and a debit for 999. This would bring the balances of the entries to 0.00.

The Idea is like to see a single journal line that contains both the account and offset account information, representing both sides of the debit and credit, (Similar to general journal) while creating the elimination proposal.