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Glad that you’ve to visit the Community page, @jmesser1979.
To retrieve the missing transactions, please try to check your Audit log. This where we can trace the deleted or any changes you’ve made in your account.
You can check this article to learn more about the audit log: Use the audit log in QuickBooks Online.
I also added a link that you can use in the future to learn more information about managing QuickBooks: Help articles.
Keep in touch if you have any queries. I've always got your back and ready to help.