Thanks for sharing your query here today, Harris. I'll provide information when managing invoice data from the ODBC driver synced into your QuickBooks Online account.
Since QuickBooks is dependent on the database shared from the ODBC driver, it's best to review and verify first the invoice entries created from the third-party app if it enables you to modify the invoice's number. Then, you can consider importing them again to your QBO account so these data are synced similarly to the ODBC setup.
If you're able to configure it from the app and the information from QuickBooks still persists, I suggest reaching out to ODBC support to help you manage customer invoices and further guide you in acquiring this matter.
I'm also including this reference to help you add other details and personalize your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.
I'll leave this forum available, so you can always reply to this post whenever you require additional assistance managing invoices in your account. Stay safe and have a good one!
