QuickBooks app will not allow me to add sales tax to my line items on an invoice, only on the app, it works fine on my laptop

Hello there, jsdequip.

Sometimes, cache-related issues can cause your QuickBooks to load incorrectly. I recommend clearing your data and restarting your device.

Here's how to do it:

1. Open your device settings.
2. Select the Apps (varies by device).
3. Choose the QuickBooks app from the list, then select storage.
4. Click the clear data.
5. Restart your device.
6. Uninstall and reinstall the app.

For additional troubleshooting steps that may be helpful, such as clearing the cache or addressing syncing issues, check out our article: Fix Common Errors in QuickBooks Online Mobile App for Android. It provides useful insights for resolving issues on Android devices.

We are always here to assist you and answer any questions you may have in QuickBooks Online.

Thanks for keeping us updated after following the recommended troubleshooting steps to resolve the sales tax issue, Jsdequip. 

You mentioned seeing a line item that would only allow you to choose Flat rate, Hourly, or Quantity. Can you confirm if you're using QuickBooks Online (QBO) or QuickBooks Self-Employed (QBSE) mobile app?

Please note that QBSE does not support sales tax. This is why you can only see the Flat rate, Hourly, or Quantity options when creating invoices. If you're inadvertently logged in to this version, we recommend installing the correct mobile app to use the Sales tax feature. 

Here's an article as a guide: How to download the QuickBooks Online mobile app. 

If can't still see the sales tax option, even if you're already logged in to the correct app, I suggest reaching out to our live support teams. They can take a closer look at your account and check why you're unable to choose or add sales taxes when creating an invoice. 

Follow these steps on how to reach out to them:

1. Log in to this link on a web browser: https://quickbooks.intuit.com/.
2. Click the Help menu in the upper-right-hand corner of QBO.
3. Proceed to the Assistant tab.
4. Type in "contact support" in the chat box and press Enter.
5. Select Contact Support Team, then type in "contact support one more time.
6. Choose No, I still need help.
7. Click Chat.

Feel free to use this article as a guide in case you need to check on the status of an invoice in the app: Track the status of invoices in the QuickBooks Online mobile app.

You can always tap on us and ask questions whenever you need help.