Hi SCL82
Welcome to the Community Forum.
When you began using MYOB Business, you will be prompted to enter the opening balances of all your accounts. As mentioned in that article it is not possible to change the opening date and balance after you start using it If a mistake was made, you would need to cancel the file and start again.
In your situation, instead of migration, you could create a fresh MYOB Business subscription, then import only the necessary information from your old AccountRight version?
Hope that answers your question and do let me know if you require more assistance.
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