Anyone having a problem posting invoice amount to app on android? I post amount and then it clears it back to zero.

Currently, there isn't any reported issue when posting invoice amounts through the QuickBooks Online (QBO) mobile app, @mail34. Let me share further details about this and guide you with some troubleshooting steps to fix this matter.

Your QBO mobile app's stored data may be full that's why you're experiencing some unusual behavior using the system. You'll have to clear your app data to refresh the system and remove the older files that cause the issue There are two places to execute the process. In the app itself and your device settings.

In the QuickBooks Online (QBO) app:

1. Go to the More Options (⋮) icon.
2. Select Settings.
3. Choose Refresh Data, and then select Yes.

In your Android device's Settings:

1. Go to Settings.
2. Select Apps (varies by device).
3. Choose the QuickBooks app from the list, and then select Storage.
4. Finally, select clear data.

After that, close the app to make sure the system is fully refreshed. Then, reopen it to post the invoice amount again.

In case the issue persists, you can uninstall and reinstall the QBO app on your Android device. This way, you're able to fix any issues you've encountered that affect you while recording your business transactions.

In the meantime, I'm adding this article to learn more about the QBO app features available for supported devices: Compare mobile app features. It contains a comparison chart between an Android phone and tablet.

Let me know how it goes in the comments below. If you have other concerns about managing invoices and sales transactions using the QBO app, I'm just around to help. Take care always.