Hi Subhadeep
Are you doing a mid of the year transfer, that the client wants to have details at the line item level? What good it will do? All your AP and AR will be at line item levels since you will be transferring the open items. Now coming to your balances for balance sheet items, you can capture the items at account assignment level like Profit center or business area rather than loading the balances for GL only depending on what account assignment level you have. For Inventory, you will anyways be loading at material and plant combination using Mtype 561, so your business will anyways know balances for material.
For your P&L Accounts, assuming you are doing mid of year upload, you can load the balances at Cost Object level like cost center or IO or WBS element. Is there any specific legal requirement that your business wants to see the balances at line item level in legacy. I have not heard of any such requirement in any of the countries as yet. However, if that is a legal requirement, than you can even load the line items at line item levels and to comply with the legal requirements in some countries for holding the accounting data of legacy, you can always do that in archieve. I believe it is more of a cutover management which needs to be done with the business. I had done a project with the second biggest beverage company in the world and had a similar kind of requirement. However, we asked them to show the legal requirement where the line item need to be shown, but ultimately it was only a question of mindset and the customer's business also included India. For 7 year recording requirement, the business agreed to archieve the data and keep the records. This could easily be retrieved through the archieve tapes.
Regards
Sanil Bhandari