If you want to migrate from QBO CA to QBD CA, there are 2 options:
1. Export your data out of QBO and import them into QBD (e.g QBW file) using a 3rd party migration tool
https://transactionpro.grsm.io/qbo, or
https://partners.saasant.com/affiliate/idevaffiliate.php?id=5051_2
OR
2. Purchase a 3rd party migration service
