Can I sync data back to my legacy company file after I migrate to BQE CORE?

No, currently we offer a one-way data migration from your existing BQE product to BQE CORE. You can contact your Account Manager at sales@bqe.com for this. However, you can sync your data with your accounting software (QuickBooks, Xero or MYOB AccountRight) bi-directionally. Check CORE Help for details.