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I'll share with you the steps on how you can recreate transactions in QBO, shandasull.
Here's how to recreate customer-related transactions:
These steps will also guide you how to recreate vendor-related transactions:
You can also run a report to have a quick review if all transactions are already recreated. Just go to the Reports menu and select Transaction List by Customer or Transaction List by Vendor.
Let me know if you need anything else.