Welcome to the Community. I'll be happy to help so your client has the right report to view their annual report.
Based on what you've described, the two most important reports that you'd need to view annual returns are:
Profit & Loss report
Balance Sheet report
Note: Both of these reports are available directly from the Reports tab.
Once you've opened any report, you can customize is so you can view the info annually. Here's an article which shows you how to : Customize reports in QuickBooks Online.
In case you have other questions, feel free to contact our support team using this link here.
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