Quick books I-phone app sales tax issue.Does not have (Based on location) where as my QBO does. Some invoices have incorrect sales tax and ship to zip code is correct.

We can take some troubleshooting measures to resolve any issues you're currently experiencing with your QuickBooks mobile apps, Joe. 

Let's begin by resetting the app data to clear its cache. This will help remove any excessive cache that has accumulated in your QBO. You can start by refreshing your mobile app and device settings. To do this, click on Help and then select Reset App Data.

If you're having storage issues on your iPhone, you can troubleshoot it by accessing your device settings. Simply go to Settings, click Setting General iPhone Storage, and choose an app that's taking up a lot of space. You can select the Offload App option to free up storage without deleting any app data. 

Alternatively, you can restart your device and open the app again. If the problem persists, you can uninstall the application and then reinstall it to start afresh. Let me guide you on how.

1. Tap and hold QuickBooks Online on your phone.
2. Drag the app to the Uninstall section.
3. Click Yes to confirm.

I'd also recommend checking out these articles for more reference about using the app:

• QuickBooks Online Mobile App FAQ
• Compare Mobile App Features

I'd be happy to hear any updates after performing the steps, as I want to ensure this is resolved for you. Don't hesitate to reach us again. Have a great day ahead!