All my customer data is gone from the app. What can I do?

We can start by ensuring that you're logged into the correct account, checking for updates, reinstalling the app, and clearing cache. Let's go through your options to resolve this.

Follow these steps to refresh your data and clear the app's cache:

For IOS: 

1. Go to Settings, then tap General.
2. Tap iPhone Storage, then click the QuickBooks Online app.
3. Tap Offload App. This will free up the storage without deleting your app's documents and data. 

For Android:

1. Go to Menu ☰, then tap More Options ⋮.
2. Tap Settings, then Refresh Data.
3. Tap YES to confirm.

Additionally, a simple restart of your device can also clear temporary glitches and resolve unexpected issues. If, after these attempts, you still suspect that data might have been inadvertently deleted, explore recovery options by visiting the Intuit website. Navigate to the Privacy and Security section where you’ll find resources and steps to potentially recover your lost data.

To further support your troubleshooting efforts and ensure that every aspect of your financial management is optimized, I also recommend connecting with our QuickBooks Live Expert Assisted team. This team of professionals specializes in providing tailored assistance and advice, and can offer deeper insights into resolving your current issues and help refine your overall financial strategies.

Keep us in the loop by replying to the thread if you have more questions and updates. We'll be here to help you out.