Thanks for raising your query for a copy of your QuickBooks Online (QBO) transactions.
At the moment, we do not have the option to duplicate your QBO transactions for you to keep. However, you can manually export your QuickBooks Online data to obtain a copy of your company. Alternatively, you may consider buying a compatible third-party service that can duplicate or copy your transaction data.
In addition, you can check out this article for customizing your reports: Common custom reports in QuickBooks Online.
Don't hesitate to comment below if you have other concerns or questions about taxes and reports. I'm always ready to answer. Have a great weekend.