Hi Anwar,

Basically accounting data migration can happen at beginning of a fiscal year or mid year:

1. When done at beginning of a fiscal year, you have only a few data to import (balance sheet accounts) because accounts of the Profit and loss are zeroed out at beginning of every financial year.

2. When done mid-year (as it seems you will be doing) you can print your ending trial balance from current system as of Sept 30th and import it in Odoo via a journal entry. However, you will not be able to do full year detailed reporting as your fiscal year data is split across 2 software.

In any case, it's good idea to ask expert advice from the customer's (or any) chattered accountant.