Hi Farzana
I have some question:
1. How will be the new company code's data be uploaded? Do you intend to just add the balances through an initial upload? If yes, you can upload using new account assignments like profit centers and cost centers
2. Does the company which is being acquired already exists in your system or no? If no, you can create the configuration for the acquiring company code and than do an initial upload of balances. If yes and it is essentially critical to have one company code, you will have to use SLO Service from SAP to merge the data.
3. Do you have a specific requirement, where you have multi country reporting requirements with the same company code being used. What is the use case for your wanting to go for new gl other than just the consolidated reporting for the two legal entities?
If consolidated reporting is just the requirement, than it makes sense to create a new company code as per option 2 and upload the data. Than using your existing consolidation tools, which I do not know what you have, consolidate the data of the two company codes. This ensures that I have a consolidated financials as well as data separate for the two divisions A & B. You definitely will need additional license cost for the migration service to New GL. As an IT Roadmap, plan for two company codes seperately, do consolidation which meets your current reporting requirement and as a future roadmap, plan for S/4 HANA Finance, which will bring New GL with document splitting as per the direction from SAP.
Thanks & regards
Sanil Bhandari